$ cve CVE-2026-61560 JSON

CVE-2026-61560

9.8

CRITICAL · CVSS 3.1 · EPSS 2.9% (pctl 87)

In your normal cycle

Critical by CVSS (9.8), but no sign of active exploitation.

Description

`@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.

Scoring

CVSS	9.8 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS	2.9% — more likely to be exploited than 87% of all CVEs
Weakness	CWE-22
On CISA KEV	no
Public exploit	none known
Published	2026-09-15
Last modified	2026-09-30

References

→ the Explorer · watch your stack · NVD