CVE-2026-61568
@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
`@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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | Critical9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.6.
Weakness
Affected products
- affected < 2.1.30
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@zereight/mcp-gitlabGHSA-vmp7-252j-cwp7 (opens in a new tab)
References (4)
- https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/zereight/gitlab-mcp/pull/555 (opens in a new tab)x_refsource_MISC
- https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290 (opens in a new tab)x_refsource_MISC
- https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vmp7-252j-cwp7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-61568)Record last updated .