CVE-2026-61568

critical · 9.6

`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preserving an attacker-controlled `Host` and `Origin`. The server accepts those headers and reaches the MCP initialization path instead of rejecting the request at the HTTP boundary. Version 2.1.30 contains a patch.

9.6

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-15

Published

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

Weaknesses

CWE-350

References

https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290
https://github.com/zereight/gitlab-mcp/pull/555
https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30
https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-61568