---
id: CVE-2026-61560
title: '`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab'
summary: >-
  `@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 th…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
vendor: zereight
product: '@zereight/mcp-gitlab'
affected:
  - '@zereight/mcp-gitlab < 2.1.27'
patched:
  - '@zereight/mcp-gitlab 2.1.27'
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T14:17:06.550'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61560'
references:
  - url: 'https://github.com/zereight/gitlab-mcp/pull/482'
    label: security-advisories@github.com
  - url: 'https://github.com/zereight/gitlab-mcp/pull/554'
    label: security-advisories@github.com
  - url: 'https://github.com/zereight/gitlab-mcp/pull/622'
    label: security-advisories@github.com
  - url: >-
      https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5
    label: security-advisories@github.com
  - url: >-
      https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61560'
  - url: >-
      https://github.com/zereight/gitlab-mcp/commit/e436ee4ad067b64584ec9312c9e9c9a2641c1976
  - url: 'https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.27'
  - url: 'https://github.com/advisories/GHSA-cv3r-c5h8-f4g5'
tags:
  - nvd
  - ghsa
  - npm
  - cve.org
  - exploit-available
aliases:
  - GHSA-cv3r-c5h8-f4g5
ecosystem: npm
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-16T13:59:23.698471Z'
epss: 0.00703
epssPercentile: 0.51868
ingestedAt: '2026-09-15T21:44:50.658Z'
---

## Overview

`@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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-61560)

Affected packages:

- `@zereight/mcp-gitlab < 2.1.27`

Patched in:

- `@zereight/mcp-gitlab 2.1.27`

Source: https://github.com/advisories/GHSA-cv3r-c5h8-f4g5