GHSA-w3p3-7cjg-vgfw - Keycloak allows unauthorized access to resources via uma permission ticket bypass
### Description
A flaw was found in org.keycloak.authorization. An authenticated user with a granted User-Managed Access (UMA) permission ticket for one resource can exploit this by using a specific permission request prefix to bypass per-resource access control. This allows the user to gain unauthorized access to all resources of that type within the same resource server, even if they do not have a ticket for those specific resources. This vulnerability requires the resource server to be configured in PERMISSIVE policy enforcement mode and affects typed resources with ownerManagedAccess enabled, where no explicit policy protects the resource type. The primary consequence is unauthorized information disclosure or modification of resources.
MEDIUM
Severity & confidence
Source severitymedium
Platform severitymedium
Confidencemedium
Exploitationunknown
CVSS4.6
Affected
Vendorsorg.keycloak:keycloak-services
Productsorg.keycloak:keycloak-services
Reporting sources (1)
GitHub Security Advisories
Timeline & provenance
Published2026-10-29T16:37:57
Last updated2026-11-05T15:48:34
Ingested2026-10-29T16:43:21
FreshnessNEAR-REAL-TIME
Threat typeadvisory
Recommended action
Review the advisory and upgrade affected packages to the first patched version.
Next steps
- Identify affected systems in your environment.
- Apply the vendor patch or mitigation guidance.
- Review logs for indicators described in the advisory.
- Follow the affected vendor/product to track updates.
Confidence explanation
Reported by a single or secondary source; treat as indicative, verify before acting.
Source type: vendor ยท Original: GitHub Security Advisories