CVE-2026-23552

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, Keycloak

Apache Camel

< 4.18.0

Fix

Available

CVSS 3.1

9.1 CRITICAL

EPSS

0.4% (35th percentile)

Weakness

CWE-346

NVD status

Analyzed

Published

2026-02-23