CVE-2026-12112 HIGH

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

Weakness CWE-287 · Improper authentication
Published June 23, 2026
Last update June 30, 2026

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 23, 2026 CVE published
June 30, 2026 Record updated