FKIE_CVE-2026-39829

Vulnerability from fkie_nvd - Published: 2026-05-22 04:16 - Updated: 2026-07-01 13:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
References
security@golang.orghttps://go.dev/cl/781641Issue Tracking
security@golang.orghttps://go.dev/cl/781661Issue Tracking
security@golang.orghttps://go.dev/issue/79565Issue Tracking
security@golang.orghttps://groups.google.com/g/golang-announce/c/a082jnz-LvIMailing List
security@golang.orghttps://pkg.go.dev/vuln/GO-2026-5018Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:26546
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:26547
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:29455
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-39829
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2480681
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39829.json
Impacted products
Vendor Product Version
golang crypto *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "parseRSA"
            },
            {
              "name": "checkDSAParams"
            },
            {
              "name": "parseDSA"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "NewSignerFromKey"
            },
            {
              "name": "ParseAuthorizedKey"
            },
            {
              "name": "ParseKnownHosts"
            },
            {
              "name": "ParsePrivateKey"
            },
            {
              "name": "ParsePrivateKeyWithPassphrase"
            },
            {
              "name": "ParsePublicKey"
            },
            {
              "name": "ParseRawPrivateKey"
            },
            {
              "name": "ParseRawPrivateKeyWithPassphrase"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@golang.org"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AppStream (v. 9)",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:advanced_cluster_security:4.10::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Advanced Cluster Security for Kubernetes 4.10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:advanced_cluster_security:4.9::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Advanced Cluster Security for Kubernetes 4.9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:assisted_installer:2"
          ],
          "defaultStatus": "affected",
          "product": "Assisted Installer for Red Hat OpenShift Container Platform 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_builds:1"
          ],
          "defaultStatus": "affected",
          "product": "Builds for Red Hat OpenShift",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:cert_manager:1"
          ],
          "defaultStatus": "affected",
          "product": "cert-manager Operator for Red Hat OpenShift",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:confidential_compute_attestation:1"
          ],
          "defaultStatus": "affected",
          "product": "Confidential Compute Attestation",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:cryostat:4"
          ],
          "defaultStatus": "affected",
          "product": "Cryostat 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:external_secrets_operator:1"
          ],
          "defaultStatus": "affected",
          "product": "External Secrets Operator for Red Hat OpenShift",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:multicluster_engine"
          ],
          "defaultStatus": "affected",
          "product": "Multicluster Engine for Kubernetes",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_api_data_protection:1"
          ],
          "defaultStatus": "affected",
          "product": "OpenShift API for Data Protection",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_pipelines:1"
          ],
          "defaultStatus": "affected",
          "product": "OpenShift Pipelines",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:serverless:1"
          ],
          "defaultStatus": "affected",
          "product": "OpenShift Serverless",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:advanced_cluster_security:4"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Advanced Cluster Security 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ceph_storage:9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ceph Storage 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:edge_manager:1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Edge Manager 1",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_devspaces:3"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Dev Spaces",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:devworkspace"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Dev Workspaces Operator",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:windows_machine_config"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift for Windows Containers",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_gitops:1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift GitOps",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_service_on_aws:1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift on AWS",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:container_native_virtualization:4"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Virtualization 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openstack:16.2"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenStack Platform 16.2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openstack:17.1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenStack Platform 17.1",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openstack:18.0"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenStack Platform 18.0",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Quay 3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:trusted_artifact_signer:1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Trusted Artifact Signer",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_security_profiles_operator:1"
          ],
          "defaultStatus": "affected",
          "product": "Security Profiles Operator",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:zero_trust_workload_identity_manager:1"
          ],
          "defaultStatus": "affected",
          "product": "Zero Trust Workload Identity Manager",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:zero_trust_workload_identity_manager:0"
          ],
          "defaultStatus": "affected",
          "product": "Zero Trust Workload Identity Manager - Tech Preview",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_data_foundation:4"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Openshift Data Foundation 4",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "D540395B-31B8-4B07-8F79-F5C631BBD5C8",
              "versionEndExcluding": "0.52.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2."
    }
  ],
  "id": "CVE-2026-39829",
  "lastModified": "2026-07-01T13:17:10.920",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-39829",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-22T18:52:38.155082Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-22T04:16:22.310",
  "references": [
    {
      "source": "security@golang.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://go.dev/cl/781641"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://go.dev/cl/781661"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://go.dev/issue/79565"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Mailing List"
      ],
      "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://pkg.go.dev/vuln/GO-2026-5018"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26546"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26547"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:29455"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-39829"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480681"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39829.json"
    }
  ],
  "sourceIdentifier": "security@golang.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}


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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.