CVE-2026-12382 Aap-gateway: missing requestheaderstoremove allows mtls bypass via subject header spoofing
An unauthenticated attacker can bypass mTLS authentication by spoofing the Subject header to inject arbitrary events into protected EDA streams.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-12382?
CVE-2026-12382 is a high-severity authentication bypass vulnerability in Red Hat Ansible Automation Platform 2.5 for RHEL 8, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2026-12382?
How do I fix CVE-2026-12382?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-12382 being exploited?
There is no known exploitation of CVE-2026-12382 in the wild and no public exploit code.
Sources
Also known as GHSA-45w6-c976-v24q.