CVE-2026-61560
CVE-2026-61560 · @zereight/mcp-gitlab's unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and full account takeover
This page contains facts from public vulnerability sources. Check the original advisory before updating.
`@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.
CVSS 9.8 · Critical · EPSS 2.9% · Public exploit · Fix available
- Published
- Updated
Stack: node
Affected products and versions
gitlab-mcp
- Versions
- < 2.1.27: Affected
No fix published
@zereight/mcp-gitlab npm
- Affected ranges
- SEMVER: < 2.1.27
Update to 2.1.27