# CVE-2026-61568

## Summary

- **CVE ID:** CVE-2026-61568
- **Severity:** CRITICAL
- **CVSS Score:** 9.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
- **CWE:** CWE-350
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 16, 2026

## 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.

## Affected Products

- zereight — gitlab-mcp (< 2.1.30)

## References

- [CNA](https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7)
- [CNA](https://github.com/zereight/gitlab-mcp/pull/555)
- [CNA](https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290)
- [CNA](https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.32%
- **EPSS Percentile:** 25.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._