CVE-2026-61568
critical`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab.
`@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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290 security-advisories@github.com
- https://github.com/zereight/gitlab-mcp/pull/555 security-advisories@github.com
- https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30 security-advisories@github.com
- https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7 security-advisories@github.com