{
  "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  * tomcat11-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-admin-webapps-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-common-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-docs-webapp-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-el-6.0-api-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-jsp-4.0-api-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-lib-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-servlet-6.1-api-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-user-instance-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-webapps-11.0.25-0.1.hum1 (noarch)\n  * tomcat11-11.0.25-0.1.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-2026:56039",
        "url": "https://access.redhat.com/errata/RHSA-2026:56039"
      },
      {
        "category": "external",
        "summary": "https://images.redhat.com/",
        "url": "https://images.redhat.com/"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-66299",
        "url": "https://access.redhat.com/security/cve/CVE-2026-66299"
      },
      {
        "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_56039.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
    "tracking": {
      "current_release_date": "2026-08-19T04:47:16+00:00",
      "generator": {
        "date": "2026-08-19T04:47:16+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.16"
        }
      },
      "id": "RHSA-2026:56039",
      "initial_release_date": "2026-08-18T09:28:35+00:00",
      "revision_history": [
        {
          "date": "2026-08-18T09:28:35+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-08-18T09:36:04+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-08-19T04:47:16+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@11.0.25-0.1.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@11.0.25-0.1.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-2026-66299",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2026-07-28T17:29:36.546307+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2508085"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Apache Tomcat. This uncontrolled resource consumption vulnerability, located in the WebSocket chat example, allows a remote attacker to cause a Denial of Service (DoS) by exhausting system resources. This can lead to the affected system becoming unresponsive or crashing.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tomcat: Apache Tomcat: Denial of Service via WebSocket chat example",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate severity flaw in Apache Tomcat\u0027s WebSocket chat example could lead to a denial of service. The impact is limited as the vulnerable component is part of an example application, which is generally not deployed in production environments. Exploitation requires the example application to be present and accessible.",
          "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-2026-66299"
        },
        {
          "category": "external",
          "summary": "RHBZ#2508085",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508085"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-66299",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-66299"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-66299",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66299"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k",
          "url": "https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k"
        }
      ],
      "release_date": "2026-07-28T14:29:05.810000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-18T09:28:35+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-2026:56039"
        },
        {
          "category": "workaround",
          "details": "To mitigate this vulnerability, remove the `examples` web application from your Apache Tomcat installation. This can typically be achieved by deleting the `examples` directory or `examples.war` file from the `webapps` directory of your Tomcat installation. A restart of the Tomcat service may be required for the changes to take full effect.",
          "product_ids": [
            "Red Hat Hardened Images:tomcat11-main@noarch",
            "Red Hat Hardened Images:tomcat11-main@src"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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:L",
            "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: Apache Tomcat: Denial of Service via WebSocket chat example"
    }
  ]
}