CVE-2026-23552 Apache Camel: Camel-Keycloak: Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy
Attackers can bypass tenant isolation by using tokens from one Keycloak realm to access resources in another due to missing issuer validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23552?
CVE-2026-23552 is a critical authentication bypass vulnerability in Apache Camel, published on 23 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-346
Which versions are affected by CVE-2026-23552?
2 open source packages ship an affected version, including org.apache.camel:camel-keycloak. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.camel:camel-keycloak Maven | From 4.15.0 | 4.18.0 |
org.apache.camel:camel-keycloak Maven | From 4.15.0 | 4.18.0 |
Products include Apache Camel.
How do I fix CVE-2026-23552?
Upgrade org.apache.camel:camel-keycloak to 4.18.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-23552 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23552 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Apache Camel
- CVE-2026-33453 Apache camel-coap allows header injection that can lead to remote code execution
- CVE-2026-40453 Apache Camel has an incomplete fix for CVE-2025-27636
- CVE-2026-80351 Apache Camel K: Camel K Tenant repositories reach Maven execution inside operator pod
- CVE-2026-80352 Apache Camel K: Camel K Master trait serviceAccountName YAML injection lets CR author apply arbitrary objects
- CVE-2026-71300 Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection
Sources
Also known as GHSA-c3f3-cc42-xr9v.