CVE-2026-12382: Aap-gateway: missing requestheaderstoremove allows mtls bypass via subject header spoofing

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-15 · updated 2026-08-12
Weakness: CWE-290

Description

A flaw was found in the AAP Gateway Envoy proxy configuration. The non-mTLS route to EDA event streams does not remove the Subject HTTP header from client requests, despite the source code defining requestHeadersToRemove for this header. An unauthenticated remote attacker can inject a spoofed Subject header matching a legitimate client certificate DN to bypass mTLS authentication and inject arbitrary events into protected EDA event streams.

Affected products

Red Hat Ansible Automation Platform 2.5 for RHEL 8: all versions — fixed in 0:2.5.20260715-1.el8ap
Red Hat Ansible Automation Platform 2.5 for RHEL 9: all versions — fixed in 0:2.5.20260715-1.el9ap
Red Hat Ansible Automation Platform 2.6: all versions — fixed in 1777311120
Red Hat Ansible Automation Platform 2.6 for RHEL 9: all versions — fixed in 0:2.6.20260422-1.el9ap
Red Hat Ansible Automation Platform 2.7: all versions — fixed in 1783919486

How to fix

Upgrade to a fixed version: Red Hat Ansible Automation Platform 2.5 for RHEL 8 0:2.5.20260715-1.el8ap; Red Hat Ansible Automation Platform 2.5 for RHEL 9 0:2.5.20260715-1.el9ap; Red Hat Ansible Automation Platform 2.6 1777311120; Red Hat Ansible Automation Platform 2.6 for RHEL 9 0:2.6.20260422-1.el9ap; Red Hat Ansible Automation Platform 2.7 1783919486. Check the vendor advisory for mitigations.

References

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