CVE-2026-15554 Red Hat CVE debrief

Who should care

Defenders responsible for Red Hat JBoss Enterprise Application Platform 7.4.25 systems, particularly those with direct TCP access to port 8009, should assess exposure and potential impact.

Why it matters

CVE-2026-15554 allows unauthenticated attackers to bypass CLIENT-CERT authentication in Red Hat JBoss Enterprise Application Platform 7.4.25. Defenders should verify exposure, assess impact, and update security configurations.

• Potential bypass of CLIENT-CERT authentication
• Possible injection of forged X.509 certificates
• Unauthenticated access to sensitive data or systems
• Need for verification of system exposure and security configurations

Technical summary

The Undertow AJP listener in Red Hat JBoss Enterprise Application Platform 7.4.25 honours forged ssl_cert and is_ssl AJP attributes without requiring shared-secret authentication. This allows 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. The vulnerability enables potential bypass of CLIENT-CERT authentication, possible injection of forged X.509 certificates, and unauthenticated access to sensitive data or systems.

Defensive priority

Defenders should prioritize verifying exposure of Red Hat JBoss Enterprise Application Platform 7.4.25 to unauthenticated attackers with direct TCP access to port 8009.

Recommended defensive actions

• Verify exposure of Red Hat JBoss Enterprise Application Platform 7.4.25 to unauthenticated attackers with direct TCP access to port 8009
• Assess the impact of potential CLIENT-CERT authentication bypass on the organization's systems
• Review and update security configurations for Red Hat JBoss Enterprise Application Platform 7.4.25
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Red Hat JBoss Enterprise Application Platform 7.4.25. The vulnerability allows an unauthenticated attacker to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate via the AJP protocol.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.