HIGH 8.1 GitHub
CVE-2026-9800
Keycloak vulnerable to authorization bypass via incorrect uri comparison
### Description
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Affected Products
- maven/org.keycloak:keycloak-services < 26.6.4
- maven/org.keycloak:keycloak-policy-enforcer < 26.0.10
References
- https://github.com/advisories/GHSA-f5p5-6xmx-p252
- https://github.com/keycloak/keycloak/security/advisories/GHSA-f5p5-6xmx-p252
- https://nvd.nist.gov/vuln/detail/CVE-2026-9800
- https://access.redhat.com/errata/RHSA-2026:30049
This high severity vulnerability with a CVSS score of 8.1 was published on 2026-10-29 via GitHub. Affected: maven/org.keycloak:keycloak-services < 26.6.4, maven/org.keycloak:keycloak-policy-enforcer < 26.0.10.
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