GHSA-cv3r-c5h8-f4g5: @zereight/mcp-gitlab: Unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and f
HIGHCritical vulnerability — CVSS 9.8
What to do
- Critical severity — schedule an urgent patch.
### Summary 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. ### Details Two issues chain together: **1. …
CVE · detail
- CVE-2026-61560nvd ↗EPSS 0.70%
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