# 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.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Jul 2026
- **Updated:** 12 Aug 2026
- **Also known as:** GHSA-45w6-c976-v24q

## 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 (Authentication Bypass by Spoofing)

## Which versions are affected by CVE-2026-12382?


## How do I fix CVE-2026-12382?

Apply the vendor's patch.

## Is CVE-2026-12382 being exploited?

There is no known exploitation of CVE-2026-12382 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12382 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-12382 in the wild and no public exploit code.

Affected product: Red Hat Ansible Automation Platform 2.5 for RHEL 8. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-12382/ (Markdown: https://insights.sbomify.com/CVE-2026-12382/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12382
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12382
- OSV: https://osv.dev/vulnerability/CVE-2026-12382

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-12382/
Summaries are generated and may contain mistakes; the official description above is the record.