CVE-2026-23552

Apache Camel: Camel-Keycloak: Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy

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

Apache Software Foundation · Apache Camel

CVSS v3.1 CNA

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.59% chance of exploitation in the next 30 days, 47th percentile

Published

2026-02-23

Proof-of-concept exploits (1)

• oscerd/CVE-2026-235520★ · 2026-02-09

Security advisories

• https://camel.apache.org/security/CVE-2026-23552.html
• http://www.openwall.com/lists/oss-security/2026/02/18/7
• advisories/GHSA-c3f3-cc42-xr9v

References

• CVE Record
• NVD entry