{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "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 Red Hat Hardened Images RPMs is now available.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "This update includes the following RPMs:\n\ntomcat11:\n  * tomcat11-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-admin-webapps-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-common-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-docs-webapp-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-el-6.0-api-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-jsp-4.0-api-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-lib-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-servlet-6.1-api-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-user-instance-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-webapps-11.0.22-0.1.hum1 (noarch)\n  * tomcat11-11.0.22-0.1.hum1.src (src)",
        "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-2026:13745",
        "url": "https://access.redhat.com/errata/RHSA-2026:13745"
      },
      {
        "category": "external",
        "summary": "https://images.redhat.com/",
        "url": "https://images.redhat.com/"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-43512",
        "url": "https://access.redhat.com/security/cve/CVE-2026-43512"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_13745.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
    "tracking": {
      "current_release_date": "2026-05-29T08:51:24+00:00",
      "generator": {
        "date": "2026-05-29T08:51:24+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.8.1"
        }
      },
      "id": "RHSA-2026:13745",
      "initial_release_date": "2026-05-05T13:37:49+00:00",
      "revision_history": [
        {
          "date": "2026-05-05T13:37:49+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-05-28T17:56:47+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-05-29T08:51:24+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Hardened Images",
                "product": {
                  "name": "Red Hat Hardened Images",
                  "product_id": "Red Hat Hardened Images",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:hummingbird:1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Hardened Images"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "tomcat11-main@noarch",
                "product": {
                  "name": "tomcat11-main@noarch",
                  "product_id": "tomcat11-main@noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/tomcat11@11.0.22-0.1.hum1?arch=noarch\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "tomcat11-main@src",
                "product": {
                  "name": "tomcat11-main@src",
                  "product_id": "tomcat11-main@src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/tomcat11@11.0.22-0.1.hum1?arch=src\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-source-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "tomcat11-main@noarch as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:tomcat11-main@noarch"
        },
        "product_reference": "tomcat11-main@noarch",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "tomcat11-main@src as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:tomcat11-main@src"
        },
        "product_reference": "tomcat11-main@src",
        "relates_to_product_reference": "Red Hat Hardened Images"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-43512",
      "cwe": {
        "id": "CWE-303",
        "name": "Incorrect Implementation of Authentication Algorithm"
      },
      "discovery_date": "2026-05-12T16:01:26.008892+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2476511"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate flaw in Apache Tomcat allows an authentication bypass when DIGEST authentication is configured. An attacker can authenticate as any unknown user by providing the password \u0027null\u0027, potentially gaining unauthorized access to applications protected by DIGEST authentication. Red Hat products are only affected if they are configured to use DIGEST authentication, which is not a common, out of the box and expected configuration for Production environments. \n\nFurthermore, because the unknown user is not mapped to any valid realm roles, their access is still restricted by standard application authorization constraints, significantly limiting the actual impact.\n\nThe unknown user is not mapped to any existing user, which means, it does not steal credentials nor impersonate an existing user. This new user is expected to have the minimum possible authentication and authorization range within the realm inherited roles.",
          "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": [
          "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-2026-43512"
        },
        {
          "category": "external",
          "summary": "RHBZ#2476511",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476511"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43512",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43512"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43512",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43512"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73",
          "url": "https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73"
        }
      ],
      "release_date": "2026-05-12T15:24:02.424000+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"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, disable DIGEST authentication within Apache Tomcat if it is not essential for your environment. This involves modifying the server\u0027s authentication configuration to utilize alternative methods or remove the DIGEST realm. A service restart is required for these changes to take effect and may impact functionality relying on DIGEST authentication.",
          "product_ids": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/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: Apache Tomcat: Authentication bypass via digest authentication"
    }
  ]
}