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CVE-2026-4636

8.1 high SSVC exploitation: none Modified
NVD · CVE.org

A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.

Fix

Patch, vendor advisory and mitigation references on NVD 12

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.1 · redhatNVD modified 2026-10-26 21:10

Affected (CPE criteria) 5

  • cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
  • cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:text-only:*:*:*
  • cpe:2.3:a:redhat:build_of_keycloak:26.2.15:*:*:*:text-only:*:*:*
  • cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:text-only:*:*:*
  • cpe:2.3:a:redhat:build_of_keycloak:26.4.11:*:*:*:text-only:*:*:*

References 13