CVE-2026-61568

@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

Published Sep 15, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-vmp7-252j-cwp7 @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
History
Type Values Removed Values Added
First Time appeared Zereight
Zereight gitlab-mcp
Vendors & Products Zereight
Zereight gitlab-mcp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
Weaknesses CWE-350
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 16, 2026, 6:36 PM
Reserved
Jul 10, 2026, 4:48 PM
Status
Deferred
Published
Sep 15, 2026, 9:16 PM
Modified
Sep 30, 2026, 5:51 PM