Vulnerability-Lookup

RHSA-2026:97877

Vulnerability from csaf_redhat - Published: 2026-11-10 22:32 - Updated: 2026-11-10 22:38

Summary

Red Hat Security Advisory: delve security, bug fix, and enhancement update

Severity

Important

Notes

Topic: An update for delve is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you're using a debugger, things aren't going your way. With that in mind, Delve should stay out of your way as much as possible. Security Fix(es): * crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862) * crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031) * crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943) Bug Fix(es) and Enhancement(s): * Update Delve to 1.27 [rhel-9] (JIRA:RHEL-219306) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-56862

A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1050 - Excessive Platform Resource Consumption within a Loop

Affected products

Fixed 10 products

Product	Version	Remediation
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le	—	Vendor Fix fix
Unresolved product id: AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64	—	Vendor Fix fix

Threats

Impact Important

CVE-2026-97031

A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 10 products, the same list as for CVE-2026-56862

Threats

Impact Important

CVE-2026-111943

A flaw was found in Go's crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.

6.8 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE-295 - Improper Certificate Validation

Affected products

Fixed 10 products, the same list as for CVE-2026-56862

Threats

Impact Important

References

31 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:97877	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2515839	external
https://bugzilla.redhat.com/show_bug.cgi?id=2548336	external
https://bugzilla.redhat.com/show_bug.cgi?id=2556068	external
https://issues.redhat.com/browse/RHEL-219306	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-56862	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515839	external
https://www.cve.org/CVERecord?id=CVE-2026-56862	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56862	external
https://go.dev/cl/804261	external
https://go.dev/issue/80528	external
https://groups.google.com/g/golang-announce/c/94p…	external
https://pkg.go.dev/vuln/GO-2026-6090	external
https://access.redhat.com/security/cve/CVE-2026-97031	self
https://bugzilla.redhat.com/show_bug.cgi?id=2548336	external
https://www.cve.org/CVERecord?id=CVE-2026-97031	external
https://nvd.nist.gov/vuln/detail/CVE-2026-97031	external
https://go.dev/cl/847312	external
https://go.dev/issue/81855	external
https://groups.google.com/g/golang-announce/c/U2f…	external
https://pkg.go.dev/vuln/GO-2026-6607	external
https://access.redhat.com/security/cve/CVE-2026-111943	self
https://bugzilla.redhat.com/show_bug.cgi?id=2556068	external
https://access.redhat.com/security/vulnerabilitie…	external
https://www.cve.org/CVERecord?id=CVE-2026-111943	external
https://nvd.nist.gov/vuln/detail/CVE-2026-111943	external
https://github.com/golang/go/issues/82345	external
https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU	external
https://pkg.go.dev/vuln/GO-2026-6809	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for delve is now available for Red Hat Enterprise Linux 9.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you\u0027re using a debugger, things aren\u0027t going your way. With that in mind, Delve should stay out of your way as much as possible.\n\nSecurity Fix(es):\n\n* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)\n\n* crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031)\n\n* crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943)\n\nBug Fix(es) and Enhancement(s):\n\n* Update Delve to 1.27 [rhel-9] (JIRA:RHEL-219306)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:97877",
        "url": "https://access.redhat.com/errata/RHSA-2026:97877"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#important",
        "url": "https://access.redhat.com/security/updates/classification/#important"
      },
      {
        "category": "external",
        "summary": "2515839",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515839"
      },
      {
        "category": "external",
        "summary": "2548336",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548336"
      },
      {
        "category": "external",
        "summary": "2556068",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2556068"
      },
      {
        "category": "external",
        "summary": "RHEL-219306",
        "url": "https://issues.redhat.com/browse/RHEL-219306"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_97877.json"
      }
    ],
    "title": "Red Hat Security Advisory: delve security, bug fix, and enhancement update",
    "tracking": {
      "current_release_date": "2026-11-10T22:38:51+00:00",
      "generator": {
        "date": "2026-11-10T22:38:51+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.4.5"
        }
      },
      "id": "RHSA-2026:97877",
      "initial_release_date": "2026-11-10T22:32:51+00:00",
      "revision_history": [
        {
          "date": "2026-11-10T22:32:51+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-11-10T22:32:51+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-11-10T22:38:51+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux AppStream (v. 9)",
                "product": {
                  "name": "Red Hat Enterprise Linux AppStream (v. 9)",
                  "product_id": "AppStream-9.9.0.Z.MAIN",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:enterprise_linux:9::appstream"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "delve-0:1.27.2-2.el9_9.src",
                "product": {
                  "name": "delve-0:1.27.2-2.el9_9.src",
                  "product_id": "delve-0:1.27.2-2.el9_9.src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve@1.27.2-2.el9_9?arch=src"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "delve-0:1.27.2-2.el9_9.aarch64",
                "product": {
                  "name": "delve-0:1.27.2-2.el9_9.aarch64",
                  "product_id": "delve-0:1.27.2-2.el9_9.aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve@1.27.2-2.el9_9?arch=aarch64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debugsource-0:1.27.2-2.el9_9.aarch64",
                "product": {
                  "name": "delve-debugsource-0:1.27.2-2.el9_9.aarch64",
                  "product_id": "delve-debugsource-0:1.27.2-2.el9_9.aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debugsource@1.27.2-2.el9_9?arch=aarch64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
                "product": {
                  "name": "delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
                  "product_id": "delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debuginfo@1.27.2-2.el9_9?arch=aarch64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "delve-0:1.27.2-2.el9_9.ppc64le",
                "product": {
                  "name": "delve-0:1.27.2-2.el9_9.ppc64le",
                  "product_id": "delve-0:1.27.2-2.el9_9.ppc64le",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve@1.27.2-2.el9_9?arch=ppc64le"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
                "product": {
                  "name": "delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
                  "product_id": "delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debugsource@1.27.2-2.el9_9?arch=ppc64le"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
                "product": {
                  "name": "delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
                  "product_id": "delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debuginfo@1.27.2-2.el9_9?arch=ppc64le"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "ppc64le"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "delve-0:1.27.2-2.el9_9.x86_64",
                "product": {
                  "name": "delve-0:1.27.2-2.el9_9.x86_64",
                  "product_id": "delve-0:1.27.2-2.el9_9.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve@1.27.2-2.el9_9?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debugsource-0:1.27.2-2.el9_9.x86_64",
                "product": {
                  "name": "delve-debugsource-0:1.27.2-2.el9_9.x86_64",
                  "product_id": "delve-debugsource-0:1.27.2-2.el9_9.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debugsource@1.27.2-2.el9_9?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
                "product": {
                  "name": "delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
                  "product_id": "delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/delve-debuginfo@1.27.2-2.el9_9?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-0:1.27.2-2.el9_9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64"
        },
        "product_reference": "delve-0:1.27.2-2.el9_9.aarch64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-0:1.27.2-2.el9_9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le"
        },
        "product_reference": "delve-0:1.27.2-2.el9_9.ppc64le",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-0:1.27.2-2.el9_9.src as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src"
        },
        "product_reference": "delve-0:1.27.2-2.el9_9.src",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-0:1.27.2-2.el9_9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64"
        },
        "product_reference": "delve-0:1.27.2-2.el9_9.x86_64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debuginfo-0:1.27.2-2.el9_9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64"
        },
        "product_reference": "delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debuginfo-0:1.27.2-2.el9_9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le"
        },
        "product_reference": "delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debuginfo-0:1.27.2-2.el9_9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64"
        },
        "product_reference": "delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debugsource-0:1.27.2-2.el9_9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64"
        },
        "product_reference": "delve-debugsource-0:1.27.2-2.el9_9.aarch64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debugsource-0:1.27.2-2.el9_9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le"
        },
        "product_reference": "delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "delve-debugsource-0:1.27.2-2.el9_9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)",
          "product_id": "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
        },
        "product_reference": "delve-debugsource-0:1.27.2-2.el9_9.x86_64",
        "relates_to_product_reference": "AppStream-9.9.0.Z.MAIN"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-56862",
      "cwe": {
        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
      },
      "discovery_date": "2026-08-13T22:16:41.928450+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2515839"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the `golang` `crypto/tls` package. A remote, unauthenticated attacker can exploit this flaw by continuously sending `KeyUpdate` messages during a TLS handshake, forcing the server to perform indefinite key derivation operations. This resource exhaustion can lead to a denial of service for applications and services in Red Hat products that use the affected `crypto/tls` library and are exposed to untrusted network clients.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-56862"
        },
        {
          "category": "external",
          "summary": "RHBZ#2515839",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515839"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-56862",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-56862"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56862",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56862"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/804261",
          "url": "https://go.dev/cl/804261"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/80528",
          "url": "https://go.dev/issue/80528"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6090",
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
      ],
      "release_date": "2026-08-13T21:58:53.216000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-10T22:32:51+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:97877"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages"
    },
    {
      "cve": "CVE-2026-97031",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2026-10-08T23:00:59.284728+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2548336"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as an Important severity flaw because an unauthenticated remote attacker can trigger memory exhaustion and crash server processes without requiring privileges or user interaction. Go applications that terminate TLS connections and accept Encrypted Client Hello configurations are vulnerable to resource amplification during the initial handshake. While the flaw does not facilitate arbitrary code execution or compromise data confidentiality, the resulting denial of service can disrupt critical network services.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-97031"
        },
        {
          "category": "external",
          "summary": "RHBZ#2548336",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548336"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-97031",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-97031"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-97031",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97031"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/847312",
          "url": "https://go.dev/cl/847312"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/81855",
          "url": "https://go.dev/issue/81855"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
          "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6607",
          "url": "https://pkg.go.dev/vuln/GO-2026-6607"
        }
      ],
      "release_date": "2026-10-08T22:53:58.775000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-10T22:32:51+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:97877"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references"
    },
    {
      "cve": "CVE-2026-111943",
      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
      },
      "discovery_date": "2026-10-20T09:38:36.160000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2556068"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Go\u0027s crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Important because Go applications validating TLS certificates could accept unauthorized certificates issued by distrusted intermediate Certificate Authorities, potentially compromising the integrity and confidentiality of secure network communications. Any Go-based client or server relying on standard certificate verification may be exposed to man-in-the-middle attacks if an attacker intercepts traffic using certificates derived from these intermediate keys. Exploitation requires specific network positioning and certificates generated by the untrusted intermediate authorities, limiting opportunistic widespread abuse.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
          "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
          "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "RHBZ#2556068",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2556068"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-012",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-012"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-111943",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-111943",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "https://github.com/golang/go/issues/82345",
          "url": "https://github.com/golang/go/issues/82345"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU",
          "url": "https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6809",
          "url": "https://pkg.go.dev/vuln/GO-2026-6809"
        }
      ],
      "release_date": "2026-10-20T02:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-10T22:32:51+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:97877"
        },
        {
          "category": "workaround",
          "details": "See the security bulletin for a detailed mitigation procedure.",
          "product_ids": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.src",
            "AppStream-9.9.0.Z.MAIN:delve-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debuginfo-0:1.27.2-2.el9_9.x86_64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.aarch64",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.ppc64le",
            "AppStream-9.9.0.Z.MAIN:delve-debugsource-0:1.27.2-2.el9_9.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates"
    }
  ]
}

CVE-2026-111943 (GCVE-0-2026-111943)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:52 – Updated: 2026-10-30 13:08

Title

Distrust compromised intermediate certificates in crypto/x509

Summary

On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 13:08 UTC

CWE

CWE-299 - Improper Check for Certificate Revocation

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 64 records in the last 180 days details

References

5 references

URL	Tags
https://go.dev/cl/851047
https://go.dev/issue/82345
https://groups.google.com/g/golang-announce/c/66p…
https://pkg.go.dev/vuln/GO-2026-6809
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/x509	Affected: 0 , < 1.26.10 (semver) Affected: 1.27.0-0 , < 1.27.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-21T01:24:20.498Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/20/29"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.8,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-111943",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T13:08:09.750640Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-299",
                "description": "CWE-299 Improper Check for Certificate Revocation",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-30T13:08:13.559Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/x509",
          "product": "crypto/x509",
          "programRoutines": [
            {
              "name": "Certificate.Verify"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-299: Improper Check for Certificate Revocation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T00:52:18.359Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/851047"
        },
        {
          "url": "https://go.dev/issue/82345"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/66pojueaQek"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6809"
        }
      ],
      "title": "Distrust compromised intermediate certificates in crypto/x509"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-111943",
    "datePublished": "2026-10-21T00:52:18.359Z",
    "dateReserved": "2026-10-17T13:43:28.599Z",
    "dateUpdated": "2026-10-30T13:08:13.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56862 (GCVE-0-2026-56862)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:29

Title

Limit handshake messages we are willing to accept post-handshake in crypto/tls

Summary

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:27 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 64 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/issue/80528
https://go.dev/cl/804261
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6090

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Credits

Qi Deng of Aurascape.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56862",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T15:27:34.651997Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:29:41.741Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "Conn.readRecordOrCCS"
            },
            {
              "name": "Conn.Handshake"
            },
            {
              "name": "Conn.HandshakeContext"
            },
            {
              "name": "Conn.Read"
            },
            {
              "name": "Conn.Write"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DialWithDialer"
            },
            {
              "name": "Dialer.Dial"
            },
            {
              "name": "Dialer.DialContext"
            },
            {
              "name": "QUICConn.HandleData"
            },
            {
              "name": "QUICConn.Start"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Qi Deng of Aurascape.ai"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.216Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80528"
        },
        {
          "url": "https://go.dev/cl/804261"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
      ],
      "title": "Limit handshake messages we are willing to accept post-handshake in crypto/tls"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56862",
    "datePublished": "2026-08-13T21:58:53.216Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
    "dateUpdated": "2026-08-14T15:29:41.741Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-97031 (GCVE-0-2026-97031)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 15:59

Title

Reject malformed ECH outer extension references in crypto/tls

Summary

Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-09 15:59 UTC

CWE

CWE-405 - Asymmetric Resource Consumption
CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 64 records in the last 180 days details

References

4 references

URL	Tags
https://go.dev/cl/847312
https://go.dev/issue/81855
https://groups.google.com/g/golang-announce/c/U2f…
https://pkg.go.dev/vuln/GO-2026-6607

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.26.9 (semver) Affected: 1.27.0-0 , < 1.27.2 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-97031",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T15:59:09.530145Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-405",
                "description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T15:59:17.238Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "decodeInnerClientHello"
            },
            {
              "name": "Conn.Handshake"
            },
            {
              "name": "Conn.HandshakeContext"
            },
            {
              "name": "Conn.Read"
            },
            {
              "name": "Conn.Write"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DialWithDialer"
            },
            {
              "name": "Dialer.Dial"
            },
            {
              "name": "Dialer.DialContext"
            },
            {
              "name": "QUICConn.Start"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.2",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-405: Asymmetric Resource Consumption",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T22:53:58.775Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/847312"
        },
        {
          "url": "https://go.dev/issue/81855"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6607"
        }
      ],
      "title": "Reject malformed ECH outer extension references in crypto/tls"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-97031",
    "datePublished": "2026-10-08T22:53:58.775Z",
    "dateReserved": "2026-09-23T23:03:36.988Z",
    "dateUpdated": "2026-10-09T15:59:17.238Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:97877

CVE-2026-111943 (GCVE-0-2026-111943)

CVE-2026-56862 (GCVE-0-2026-56862)

CVE-2026-97031 (GCVE-0-2026-97031)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour