Incorrect Privilege Assignment Affecting keycloak-advanced-compat package, versions <26.5.3-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.29% (21st percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAKADVANCEDCOMPAT-15267014
  • published12 Feb 2026
  • disclosed9 Feb 2026

Introduced: 9 Feb 2026

CVE-2025-14778  (opens in a new tab)
CWE-266  (opens in a new tab)

How to fix?

Upgrade Minimos:latest keycloak-advanced-compat to version 26.5.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak-advanced-compat package and not the keycloak-advanced-compat package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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's ownership against the first resource in the policy's 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.

CVSS Base Scores

version 3.1