CVE-2026-61568@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
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No exploitation reported and no EPSS estimate yet.
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`@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
- 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-350
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
zereight gitlab-mcp zereight:gitlab_mcp (from the name) | before 2.1.30 | CNA record |
References
- https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7x-refsource-confirm
- https://github.com/zereight/gitlab-mcp/pull/555x-refsource-misc
- https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290x-refsource-misc
- https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.