Redhat Foreman MCP Server Session Hijack, Priv Escalation
CVE-2026-12112 Published on June 23, 2026
Foreman-mcp-server: mcp server: active session hijacking via insecure session state reuse
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.
Vulnerability Analysis
CVE-2026-12112 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Timeline
Reported to Red Hat.
Made public. 48 days later.
Weakness Type
What is an authentification Vulnerability?
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVE-2026-12112 has been classified to as an authentification vulnerability or weakness.
Products Associated with CVE-2026-12112
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