CVE-2026-23552: Apache Camel

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component.  The Camel-Keycloak KeycloakSecurityPolicy does not validate the iss (issuer) claim of JWT tokens against the configured realm. A token issued by one Keycloak realm is silently accepted by a policy configured for a completely different realm, breaking tenant isolation. This issue affects Apache Camel: from 4.15.0 before 4.18.0. Users are recommended to upgrade to version 4.18.0, which fixes the issue.

Affected products

• Apache Camel: from 4.15.0, before 4.18.0 (fixed in 4.18.0)

Published 2026-02-23. Last modified 2026-06-17.