Vulnerability in Undertow AJP Listener affecting Red Hat Products
CVE-2026-15554

7.4HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Jboss Enterprise Application Platform 7
Red Hat Jboss Enterprise Application Platform 8
Red Hat Jboss Enterprise Application Platform Expansion Pack
Vendor
CVE Published:
11 August 2026

What is CVE-2026-15554?

The Undertow AJP listener improperly honors forged SSL_CERT and IS_SSL attributes without enforcing shared-secret authentication. This vulnerability allows unauthenticated attackers with TCP access to port 8009 to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate through the AJP protocol. Organizations using Undetow should review their configurations to enhance security and mitigate potential exploitation.

References

https://access.redhat.com/security/cve/CVE-2026-15554
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2480601
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.