---
title: "CVE-2026-61568: @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport"
url: https://erroneo.us/security/cve/CVE-2026-61568/
description: "CVE-2026-61568 (@zereight/mcp-gitlab (npm)): @zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-15
date_modified: 2026-09-16
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-61568"
kev: false
cvss: 9.6
epss: 0.00532
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-61568: @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.5% , percentile 44: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 44% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes @zereight/mcp-gitlab (npm) < 2.1.30, fixed in 2.1.30 . Check your lockfile, including transitive dependencies.

## What it is

@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 packages

- npm `@zereight/mcp-gitlab` < 2.1.30 → fixed: 2.1.30

## Affected products (CVE record)

- zereight gitlab-mcp: < 2.1.30

## Severity

- GitHub_M CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.53% probability of exploitation activity in the next 30 days; percentile 44.

## Sources

- [GitHub Advisory GHSA-vmp7-252j-cwp7](https://github.com/advisories/GHSA-vmp7-252j-cwp7)
- [CVE.org record CVE-2026-61568](https://www.cve.org/CVERecord?id=CVE-2026-61568)
- [NVD entry CVE-2026-61568](https://nvd.nist.gov/vuln/detail/CVE-2026-61568)
- [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)

---
Source page: https://erroneo.us/security/cve/CVE-2026-61568/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt