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Vulnerability record · CVE-2026-61560 · published 15 September 2026

CVE-2026-61560: Path traversal vulnerability

`@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.

9.8 CVSS 3.1 Critical EPSS 0.81% · top 44.8% CWE-22 · Path traversal Received
9.8CVSS 3.1 base score
0.81%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
16 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/zereight/gitlab-mcp/pull/482
https://github.com/zereight/gitlab-mcp/pull/554
https://github.com/zereight/gitlab-mcp/pull/622
https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5
https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5

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Source: NIST National Vulnerability Database (record CVE-2026-61560), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.