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GHSA-fm6w-rrp3-2x4w

Keycloak Affected by Broken Access Control Vulnerability in the UserManagedPermissionService

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-14778

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-services < 26.2.13 26.2.13
Maven org.keycloak:keycloak-services >= 26.5.0, < 26.5.3 26.5.3
Maven org.keycloak:keycloak-services >= 26.3.0, < 26.4.9 26.4.9

Details

As written in the advisory (Markdown source, shown as plain 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'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.

References

External links from the advisory. They lead to third-party sites.