Vulnerability Description
the Undertow AJP listener honours forged ssl_cert and is_ssl AJP attributes without requiring any shared-secret authentication. This enables an unauthenticated attacker with direct TCP access to port 8009 to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate via the AJP protocol.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:53644
- https://access.redhat.com/errata/RHSA-2026:53645
- https://access.redhat.com/errata/RHSA-2026:53646
- https://access.redhat.com/errata/RHSA-2026:53806
- https://access.redhat.com/security/cve/CVE-2026-15554
- https://bugzilla.redhat.com/show_bug.cgi?id=2480601
FAQ
What is CVE-2026-15554?
CVE-2026-15554 is a vulnerability with a CVSS score of 7.4 (HIGH). the Undertow AJP listener honours forged ssl_cert and is_ssl AJP attributes without requiring any shared-secret authentication. This enables an unauthenticated attacker with direct TCP access to port ...
How severe is CVE-2026-15554?
CVE-2026-15554 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-15554?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.