CVE-2026-61568
@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th
`@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.
| CWE | CWE-350 |
| Vendor | zereight |
| Product | gitlab-mcp |
| Published | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
zereight / gitlab-mcp
< 2.1.30
References
github.com: https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7 github.com: https://github.com/zereight/gitlab-mcp/pull/555 github.com: https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290 github.com: https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30