CVE-2026-61568
CVE-2026-61568 · @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
This page contains facts from public vulnerability sources. Check the original advisory before updating.
`@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 · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
gitlab-mcp
- Versions
- < 2.1.30: Affected
No fix published
@zereight/mcp-gitlab npm
- Affected ranges
- SEMVER: < 2.1.30
Update to 2.1.30
Original sources
- 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://nvd.nist.gov/vuln/detail/CVE-2026-61568