CVE-2026-61560
Published:September 15, 2026
Updated:October 09, 2026
"@zereight/mcp-gitlab" is a Model Context Protocol server for GitLab. Prior to version 2.1.27, the SSE transport mode ("SSE=true") exposes all MCP tools without any authentication. The "upload_markdown" tool reads arbitrary files from the server's local filesystem via an unsanitized "file_path" parameter and uploads them to a GitLab project. Combined, any unauthenticated network-reachable attacker can read "/proc/self/environ" to steal the server's "GITLAB_PERSONAL_ACCESS_TOKEN" and achieve full GitLab account takeover. This is the default configuration for Docker deployments. Version 2.1.27 contains a patch.
Affected Packages
https://github.com/zereight/gitlab-mcp.git (GITHUB):
Affected version(s) >=v1.0.77 <v2.1.27Fix Suggestion:
Update to version v2.1.27@zereight/mcp-gitlab (NPM):
Affected version(s) >=1.0.0 <2.1.27Fix Suggestion:
Update to version 2.1.27Related Resources (9)
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Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
2.90