@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
`@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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| zereight | gitlab-mcp | before 2.1.30 | 2.1.30 | Patch available | CNA |
| — | @zereight/mcp-gitlab (npm) | before 2.1.30 | 2.1.30 | Patch available | GHSA-vmp7-252j-cwp7 |
- gitlab-mcp Vendorzereight Affected before 2.1.30 Fixed in 2.1.30 Patch available CNA
- @zereight/mcp-gitlab (npm) Vendor— Affected before 2.1.30 Fixed in 2.1.30 Patch available GHSA-vmp7-252j-cwp7
Remediation
- Fix · CNA gitlab-mcp (zereight) Fixed in 2.1.30
- Fix · GHSA-vmp7-252j-cwp7 @zereight/mcp-gitlab (npm) Fixed in 2.1.30 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-61568
- 2026-10-03 Alias added: GHSA-vmp7-252j-cwp7
References
Other 5
- https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7
- https://github.com/zereight/gitlab-mcp/pull/555
- https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290
- https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30
- https://github.com/zereight/gitlab-mcp
More zereight vulnerabilities
- TI-2026-44112 Path traversal in zereight gitlab-mcp CVSS 3.1CRITICAL 9.8
- TI-2026-44067 mcp-gitlab Path Traversal via job_id Parameter CVSS 4.0CRITICAL 9.2
- TI-2026-44111 @zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery CVSS 3.1CRITICAL 9.6
Sources
- CVE-2026-61568 · CVE Program
- CVE-2026-61568 · NVD
- FIRST EPSS
- GHSA-vmp7-252j-cwp7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences