RHSA-2026:2363

Vulnerability from csaf_redhat - Published: 2026-02-09 20:36 - Updated: 2026-02-10 12:41
Summary
Red Hat Security Advisory: Red Hat build of Keycloak 26.2.13 Security Update

Notes

Topic
New Red Hat build of Keycloak 26.2.13 packages are available from the Customer Portal
Details
Red Hat build of Keycloak 26.2.13 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security fixes: * Unauthorized organization registration via improper invitation token validation (CVE-2026-1529) * Incorrect ownership checks in /uma-policy/ (CVE-2025-14778)
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.
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{
  "document": {
    "aggregate_severity": {
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      "text": "Important"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
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    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "New Red Hat build of Keycloak 26.2.13 packages are available from the Customer Portal",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat build of Keycloak 26.2.13 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.\n\nSecurity fixes:\n* Unauthorized organization registration via improper invitation token validation (CVE-2026-1529)\n* Incorrect ownership checks in /uma-policy/ (CVE-2025-14778)",
        "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"
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      "name": "Red Hat Product Security",
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    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:2363",
        "url": "https://access.redhat.com/errata/RHSA-2026:2363"
      },
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        "url": "https://access.redhat.com/security/updates/classification/#important"
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_2363.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat build of Keycloak 26.2.13 Security Update",
    "tracking": {
      "current_release_date": "2026-02-10T12:41:28+00:00",
      "generator": {
        "date": "2026-02-10T12:41:28+00:00",
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          "version": "4.7.1"
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      "id": "RHSA-2026:2363",
      "initial_release_date": "2026-02-09T20:36:53+00:00",
      "revision_history": [
        {
          "date": "2026-02-09T20:36:53+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-02-09T20:36:53+00:00",
          "number": "2",
          "summary": "Last updated version"
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          "date": "2026-02-10T12:41:28+00:00",
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          "summary": "Last generated version"
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  "product_tree": {
    "branches": [
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                "name": "Red Hat build of Keycloak 26.2.13",
                "product": {
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                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:build_keycloak:26.2::el9"
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Joshua Rogers"
          ]
        }
      ],
      "cve": "CVE-2025-14778",
      "cwe": {
        "id": "CWE-266",
        "name": "Incorrect Privilege Assignment"
      },
      "discovery_date": "2025-12-16T05:01:06.107000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2422600"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Keycloak. A significant Broken Access Control vulnerability exists in the UserManagedPermissionService (UMA Protection API). When updating or deleting a UMA policy associated with multiple resources, the authorization check only verifies the caller\u0027s ownership against the first resource in the policy\u0027s list. This allows a user (Owner A) who owns one resource (RA) to update a shared policy and modify authorization rules for other resources (e.g., RB) in that same policy, even if those other resources are owned by a different user (Owner B). This constitutes a horizontal privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "keycloak: Incorrect ownership checks in /uma-policy/",
          "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 26.2.13"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-14778"
        },
        {
          "category": "external",
          "summary": "RHBZ#2422600",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422600"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-14778",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-14778"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-14778",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14778"
        }
      ],
      "release_date": "2026-02-09T18:24:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:36:53+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 26.2.13"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2363"
        },
        {
          "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.",
          "product_ids": [
            "Red Hat build of Keycloak 26.2.13"
          ]
        }
      ],
      "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 build of Keycloak 26.2.13"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "keycloak: Incorrect ownership checks in /uma-policy/"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Reynaldo Immanuel"
          ]
        },
        {
          "names": [
            "Joy Gilbert"
          ],
          "organization": "gwthr"
        }
      ],
      "cve": "CVE-2026-1529",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "discovery_date": "2026-01-28T12:29:47.086000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2433783"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token\u0027s JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "org.keycloak.services.resources.organizations: Keycloak: Unauthorized organization registration via improper invitation token validation",
          "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 26.2.13"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1529"
        },
        {
          "category": "external",
          "summary": "RHBZ#2433783",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433783"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1529",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-1529"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1529",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1529"
        }
      ],
      "release_date": "2026-02-09T18:21:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:36:53+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 26.2.13"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2363"
        },
        {
          "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.",
          "product_ids": [
            "Red Hat build of Keycloak 26.2.13"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.2.13"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "org.keycloak.services.resources.organizations: Keycloak: Unauthorized organization registration via improper invitation token validation"
    }
  ]
}


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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.
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