{
  "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 26.6.9 packages are available from the Customer Portal",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat build of Keycloak 26.6.9 is a standalone server, based on\nthe Keycloak project, that provides authentication and\nstandards-based single sign-on capabilities for web and mobile\napplications.\n\nSecurity fixes:\n* SAML redirect binding signature bypass via percent-encoded parameter names (CVE-2026-117691)",
        "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-2026:96040",
        "url": "https://access.redhat.com/errata/RHSA-2026:96040"
      },
      {
        "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/2026/rhsa-2026_96040.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat build of Keycloak 26.6.9 Security Update",
    "tracking": {
      "current_release_date": "2026-11-07T21:37:45+00:00",
      "generator": {
        "date": "2026-11-07T21:37:45+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.4.5"
        }
      },
      "id": "RHSA-2026:96040",
      "initial_release_date": "2026-11-07T14:47:20+00:00",
      "revision_history": [
        {
          "date": "2026-11-07T14:47:20+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-11-07T14:47:20+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-11-07T21:37:45+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 26.6.9",
                "product": {
                  "name": "Red Hat build of Keycloak 26.6.9",
                  "product_id": "Red Hat build of Keycloak 26.6.9",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:build_keycloak:26.6::el9"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat build of Keycloak"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Mayssen Aidoudi"
          ],
          "organization": "Think-it GmbH"
        }
      ],
      "cve": "CVE-2026-117691",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "discovery_date": "2026-10-26T20:13:03+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2561977"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the SAML HTTP-Redirect binding implementation of Keycloak. The issue occurs because the server processes percent-encoded parameter names (like %53AMLResponse) while the signature verification logic only checks literal parameter names. An attacker can use this discrepancy to provide a crafted, unsigned SAML message that the server processes instead of a legitimately signed one, leading to full account takeover of federated users.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "keycloak-services: keycloak-services: SAML redirect binding signature bypass via percent-encoded parameter names",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that it allows for full account takeover of federated users. Successful exploitation allows an attacker to log in as any user and access their roles and data without authorization. The vulnerability\u0027s root cause is an inconsistent parsing of percent-encoded query parameters between the signature verification and message processing logic in the SAML redirect binding.",
          "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 build of Keycloak 26.6.9"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-117691"
        },
        {
          "category": "external",
          "summary": "RHBZ#2561977",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2561977"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-117691",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-117691"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-117691",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117691"
        }
      ],
      "release_date": "2026-11-05T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-07T14:47:20+00:00",
          "details": "Before applying the update, back up your existing installation,\nincluding all applications, configuration files, databases and\ndatabase settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.6.9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:96040"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.\n\n--- CME Mitigation Guidance (2026-11-06) ---\nDisclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.\n\nThe highest-value action is to align query parameter parsing between signature verification and request processing in Keycloak\u0027s SAML HTTP-Redirect binding so percent-encoded parameter names cannot evade signature checks: upgrade to the fixed Rhbk/Keycloak Rhel/Keycloak Services builds, which eliminates the parsing discrepancy between raw query parameter signature verification and decoded parameter processing in the SAML redirect binding, closing crafted HTTP GET request containing a percent-encoded unsigned SAML parameter placed before a legitimately signed parameter. Until patched, this is a concern on Keycloak instances configured to use SAML HTTP-Redirect binding for federated identity, so Audit and restrict account registration on external Identity Providers to prevent attackers from capturing legitimately signed redirect-binding messages. These controls limit blast radius and contain exploitation, but they do not fix the underlying SAML parameter parsing discrepancy signature bypass \u2014 apply the upstream patch to fully remediate.",
          "product_ids": [
            "Red Hat build of Keycloak 26.6.9"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.6.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "keycloak-services: keycloak-services: SAML redirect binding signature bypass via percent-encoded parameter names"
    }
  ]
}