High [CVE-2026-12382] missing requestHeadersToRemove allows mTLS bypass via Subject header spoofing
This high-severity Red Hat Linux advisory covers CVE-2026-12382 affecting Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Get an email when Red Hat Linux publishes the next one.
See Red Hat Linux's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
Summary
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. This flaw affects AAP deployments that use mTLS-protected EDA external event streams.
Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N). Weakness: CWE-290.
Affected Red Hat products: Red Hat Ansible Automation Platform 2.5 for RHEL 8; Red Hat Ansible Automation Platform 2.5 for RHEL 9; Red Hat Ansible Automation Platform 2.6 for RHEL 9; Red Hat Ansible Automation Platform 2.6; Red Hat Ansible Automation Platform 2.7. Red Hat fixing advisory: RHSA-2026:42078, RHSA-2026:13508, RHSA-2026:13545, RHSA-2026:42142.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
- automation-gateway-0:2.5.20260715-1.el8ap
- automation-gateway-0:2.5.20260715-1.el9ap
- automation-gateway-0:2.6.20260422-1.el9ap
- ansible-automation-platform-26/gateway-rhel9:1777311120
- ansible-automation-platform-27/gateway-rhel9:1783919486
- RHSA-2026:42078
- RHSA-2026:13508
- RHSA-2026:13545
- RHSA-2026:42142
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation checklist
- The following practices would help for avoiding exposure and mitigate this flaw: - Restrict network access to the non-mTLS EDA event stream route (/eda-event-streams/) at the firewall or load balancer level, allowing only trusted internal sources. - If mTLS-protected event streams are in use, ensure that only the /mtls/eda-event-streams/ route is accessible from untrusted networks. - Monitor EDA event stream activity for unexpected events_received counter increases that may indicate unauthorized event injection. - Review Envoy proxy logs for requests to the non-mTLS event stream route from unexpected source IPs.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
More Red Hat Linux advisories
- CVE-2026-48710May 26, 2026Security restriction bypass via malformed HTTP Host header
- CVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging paths
- CVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli Decoder
- CVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-free
- CVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCE
- CVE-2026-97229Oct 13, 2026integer overflow issue in CI/CD regular expression compiler
iPhone and Android apps · New on the App Store
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.