Incorrect Authorization Affecting org.keycloak:keycloak-services package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGKEYCLOAK-19006803
- published20 Aug 2026
- disclosed30 Jul 2026
- creditUnknown
Introduced: 30 Jul 2026
NewCVE-2026-18572 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to Incorrect Authorization due to claim handling in the UMA claim-token evaluation path. An attacker can access protected resources outside the allowed time window by supplying a forged kc.time.date_time value in a claim_token or UMA permission request, causing policy evaluation to use the attacker-controlled time instead of the server clock. The issue lives in the authorization services code that builds the DefaultEvaluationContext and merges request claims into evaluation attributes. Because user-supplied claims with the kc. prefix are accepted into that context, time-based policies can be bypassed and Resource Permission Tokens can be issued when access should have been denied.