{
  "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": "New Red Hat build of Keycloak 26.2.10 packages are available from the Customer Portal",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat build of Keycloak 26.2.10 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.\nSecurity fixes:\n* Keycloak TLS Client-Initiated Renegotiation Denial of Service (CVE-2025-11419)",
        "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-2025:18890",
        "url": "https://access.redhat.com/errata/RHSA-2025:18890"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#important",
        "url": "https://access.redhat.com/security/updates/classification/#important"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_18890.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat build of Keycloak 26.2.10 Security Update",
    "tracking": {
      "current_release_date": "2025-11-07T18:35:57+00:00",
      "generator": {
        "date": "2025-11-07T18:35:57+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.6.12"
        }
      },
      "id": "RHSA-2025:18890",
      "initial_release_date": "2025-10-21T17:13:31+00:00",
      "revision_history": [
        {
          "date": "2025-10-21T17:13:31+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2025-10-21T17:13:31+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2025-11-07T18:35:57+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat build of Keycloak 26.2.10",
                "product": {
                  "name": "Red Hat build of Keycloak 26.2.10",
                  "product_id": "Red Hat build of Keycloak 26.2.10",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat build of Keycloak"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-11419",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2025-10-07T11:12:36.431000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2402142"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "No description is available for this CVE.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "keycloak: Keycloak TLS Client-Initiated Renegotiation Denial of Service",
          "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 build of Keycloak 26.2.10"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-11419"
        },
        {
          "category": "external",
          "summary": "RHBZ#2402142",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402142"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-11419",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-11419"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-11419",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-11419"
        }
      ],
      "release_date": "2025-10-07T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-10-21T17:13:31+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.2.10"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2025:18890"
        },
        {
          "category": "workaround",
          "details": "To mitigate this vulnerability, configure Keycloak to reject client-initiated TLS renegotiation by adding the following Java system property to the Keycloak startup configuration:\n-Djdk.tls.rejectClientInitiatedRenegotiation=true\n\nThis prevents unauthenticated attackers from triggering repeated TLS renegotiations and exhausting server CPU resources.\nAdditionally, ensure that Keycloak is deployed behind proper network access controls and rate-limiting mechanisms to further reduce exposure to DoS attacks.",
          "product_ids": [
            "Red Hat build of Keycloak 26.2.10"
          ]
        }
      ],
      "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": [
            "Red Hat build of Keycloak 26.2.10"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "keycloak: Keycloak TLS Client-Initiated Renegotiation Denial of Service"
    }
  ]
}