# CVE-2026-12112: Foreman-mcp-server: mcp server: active session hijacking via insecure session state reuse

> Unauthenticated attackers can hijack administrative sessions in Foreman MCP Server, leading to privilege escalation and infrastructure-wide code execution.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Jun 2026
- **Updated:** 16 Jul 2026
- **Also known as:** GHSA-6v32-2jc8-w595

## What is CVE-2026-12112?

CVE-2026-12112 is a high-severity authentication bypass vulnerability in Redhat Satellite, published on 23 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in the foreman-mcp-server. A session management vulnerability in the MCP Server allows unauthenticated attackers to hijack active administrative sessions due to an improper cache of authenticated client connections, by trusting a non-secret session ID without re-validating authentication tokens and by logging all newly created session IDs to standard logs. This issue can result in privilege escalation and infrastructure-wide code execution.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-12112?

It affects 2 products.


Products: Redhat Satellite, Theforeman Foreman.

## How do I fix CVE-2026-12112?

No fix has been published for CVE-2026-12112 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12112 being exploited?

There is no known exploitation of CVE-2026-12112 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Satellite

- [CVE-2024-7012](https://insights.sbomify.com/CVE-2024-7012/): Puppet-foreman: an authentication bypass vulnerability exists in foreman (critical 9.8)
- [CVE-2024-7923](https://insights.sbomify.com/CVE-2024-7923/): Puppet-pulpcore: an authentication bypass vulnerability exists in pulpcore (critical 9.8)
- [CVE-2026-96659](https://insights.sbomify.com/CVE-2026-96659/): Foreman: excessive permissions for viewer role on preview (critical 9.1)
- [CVE-2023-0118](https://insights.sbomify.com/CVE-2023-0118/): Foreman: arbitrary code execution through templates (critical 9.1)
- [CVE-2008-2369](https://insights.sbomify.com/CVE-2008-2369/): Hardcoded credentials in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12112 and fix it if it is affected.

What it is: CVE-2026-12112 is a high-severity authentication bypass vulnerability in Redhat Satellite, published on 23 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-12112 in the wild and no public exploit code.

Affected product: Redhat Satellite. 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-2026-12112/ (Markdown: https://insights.sbomify.com/CVE-2026-12112/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12112
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12112
- OSV: https://osv.dev/vulnerability/CVE-2026-12112

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12112/
Summaries are generated and may contain mistakes; the official description above is the record.