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

High 7.8 Published 23 Jun 2026 Updated 16 Jul 2026

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

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

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

Which versions are affected by CVE-2026-12112?

It affects 2 products.

Products include 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.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-12112 being exploited?

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

All Redhat Satellite vulnerabilities

Sources

Also known as GHSA-6v32-2jc8-w595.