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.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - security@apache.org

Published

2026-02-23

Last modified

2026-02-23

Weaknesses

CWE-346

Affected products

• Camel (Apache)
• Apache Camel (Apache Software Foundation)

References

• https://camel.apache.org/security/CVE-2026-23552.html
• https://github.com/oscerd/CVE-2026-23552
• http://www.openwall.com/lists/oss-security/2026/02/18/7