RHSA-2026:13745

Vulnerability from csaf_redhat - Published: 2026-05-05 13:37 - Updated: 2026-06-16 21:44
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: tomcat11: * tomcat11-11.0.22-0.1.hum1 (noarch) * tomcat11-admin-webapps-11.0.22-0.1.hum1 (noarch) * tomcat11-common-11.0.22-0.1.hum1 (noarch) * tomcat11-docs-webapp-11.0.22-0.1.hum1 (noarch) * tomcat11-el-6.0-api-11.0.22-0.1.hum1 (noarch) * tomcat11-jsp-4.0-api-11.0.22-0.1.hum1 (noarch) * tomcat11-lib-11.0.22-0.1.hum1 (noarch) * tomcat11-servlet-6.1-api-11.0.22-0.1.hum1 (noarch) * tomcat11-user-instance-11.0.22-0.1.hum1 (noarch) * tomcat11-webapps-11.0.22-0.1.hum1 (noarch) * tomcat11-11.0.22-0.1.hum1.src (src)
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-2026-42498

A flaw was found in Apache Tomcat. During WebSocket authentication, the HTTP Authentication Header can be exposed to unexpected hosts. This vulnerability leads to information disclosure, potentially allowing an attacker to gain access to sensitive authentication credentials.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-201 - Insertion of Sensitive Information Into Sent Data
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:tomcat11-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:tomcat11-main@src —
Vendor Fix fix
Threats
Impact Moderate
CVE-2026-43512

A flaw was found in Apache Tomcat. When DIGEST authentication was configured, any user not known to the configured Realm would be authenticated if they presented the password "null". This allows a remote attacker to bypass security controls.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-303 - Incorrect Implementation of Authentication Algorithm
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:tomcat11-main@noarch —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:tomcat11-main@src —
Vendor Fix fix
Workaround
Threats
Impact Moderate
CVE-2026-43514

A flaw was found in Apache Tomcat. The AJP secret was comparable in non-constant time, allowing an attacker on the local network to mount a timing attack to determine the AJP secret, which may lead to unauthorized access or other security bypasses.

3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-208 - Observable Timing Discrepancy
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:tomcat11-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:tomcat11-main@src —
Vendor Fix fix
Threats
Impact Low
CVE-2026-43515

In Apache Tomcat, when multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. A remote attacker could exploit this to bypass intended security restrictions for information or actions within the application.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:tomcat11-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:tomcat11-main@src —
Vendor Fix fix
Threats
Impact Moderate
References
URL Category
https://access.redhat.com/errata/RHSA-2026:13745 self
https://images.redhat.com/ external
https://access.redhat.com/security/cve/CVE-2026-43512 external
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/security/cve/CVE-2026-43515 external
https://access.redhat.com/security/cve/CVE-2026-42498 external
https://access.redhat.com/security/cve/CVE-2026-43514 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-42498 self
https://bugzilla.redhat.com/show_bug.cgi?id=2476516 external
https://www.cve.org/CVERecord?id=CVE-2026-42498 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42498 external
https://lists.apache.org/thread/n61zwf75jrv09rz90… external
https://access.redhat.com/security/cve/CVE-2026-43512 self
https://bugzilla.redhat.com/show_bug.cgi?id=2476511 external
https://www.cve.org/CVERecord?id=CVE-2026-43512 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43512 external
https://lists.apache.org/thread/7x09x7o12solvclsl… external
https://access.redhat.com/security/cve/CVE-2026-43514 self
https://bugzilla.redhat.com/show_bug.cgi?id=2476512 external
https://www.cve.org/CVERecord?id=CVE-2026-43514 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43514 external
https://lists.apache.org/thread/2k654v5cq123npfsd… external
https://access.redhat.com/security/cve/CVE-2026-43515 self
https://bugzilla.redhat.com/show_bug.cgi?id=2476519 external
https://www.cve.org/CVERecord?id=CVE-2026-43515 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43515 external
https://lists.apache.org/thread/746nxfxod0wsocxtm… external
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        },
        {
          "category": "external",
          "summary": "RHBZ#2476512",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476512"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43514",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43514"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43514",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43514"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/2k654v5cq123npfsd1b2kk1y30owqb1m",
          "url": "https://lists.apache.org/thread/2k654v5cq123npfsd1b2kk1y30owqb1m"
        }
      ],
      "release_date": "2026-05-12T15:32:09.858000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-05-05T13:37:49+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:13745"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "tomcat-coyote: Apache Tomcat: Information disclosure via AJP secret timing discrepancy"
    },
    {
      "cve": "CVE-2026-43515",
      "cwe": {
        "id": "CWE-551",
        "name": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization"
      },
      "discovery_date": "2026-05-12T16:01:46.217175+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2476519"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In Apache Tomcat, when multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. A remote attacker could exploit this to bypass intended security restrictions for information or actions within the application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tomcat-coyote: tomcat: Improper Authorization allows security bypass",
          "title": "Vulnerability summary"
        },
        {
          "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": [
          "Red Hat Hardened Images:tomcat11-main@noarch",
          "Red Hat Hardened Images:tomcat11-main@src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43515"
        },
        {
          "category": "external",
          "summary": "RHBZ#2476519",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476519"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43515",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43515"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43515",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43515"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb",
          "url": "https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb"
        }
      ],
      "release_date": "2026-05-12T15:33:23.311000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-05-05T13:37:49+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:13745"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "tomcat-coyote: tomcat: Improper Authorization allows security bypass"
    }
  ]
}


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Tags
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.