Vulnerability in Apache Camel
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Apache Camel
- Apache Software Foundation Camel — versions 4.15.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- camel.apache.org/security/CVE-2026-23552.html (vendor-advisory, Vendor Advisory)
- github.com/oscerd/CVE-2026-23552 (Exploit, Third Party Advisory, exploit)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-23552?
- CVE-2026-23552 is a critical-severity vulnerability in Apache Camel, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2026-02-23.
- How severe is CVE-2026-23552?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-23552 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.