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  4. CVE 2026 61560 zereightmcp gitlabs unauthenticated arbitrary
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-61560GHSA-CV3R-C5H8-F4G5

@zereight/mcp-gitlab's unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and full account takeoverCVE-2026-61560

Answer in brief

CVE-2026-61560 records a Critical severity (CVSS 9.8) vulnerability in @zereight/mcp-gitlab's unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and full account takeover. The current sources do not mark it as known exploited. The current feed maps zereight/gitlab-mcp (generic), @zereight/mcp-gitlab (npm), @zereight/mcp-gitlab (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 30, 2026Source checked Oct 31, 2026First seen by HOL Sep 15, 2026Material review Sep 30, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps zereight/gitlab-mcp (generic), @zereight/mcp-gitlab (npm), @zereight/mcp-gitlab (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
zereight/gitlab-mcpgeneric<2.1.272.1.27
@zereight/mcp-gitlabnpm<2.1.272.1.27
@zereight/mcp-gitlabnpm>=0 <2.1.272.1.27

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for zereight/gitlab-mcp, @zereight/mcp-gitlab, @zereight/mcp-gitlab.
  2. 2Review the reported fix. Update zereight/gitlab-mcp to 2.1.27; @zereight/mcp-gitlab to 2.1.27; @zereight/mcp-gitlab to 2.1.27 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 15, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
Upstream source description

`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Prior to version 2.1.27, the SSE transport mode (`SSE=true`) exposes all MCP tools without any authentication. The `upload_markdown` tool reads arbitrary files from the server's local filesystem via an unsanitized `file_path` parameter and uploads them to a GitLab project. Combined, any unauthenticated network-reachable attacker can read `/proc/self/environ` to steal the server's `GITLAB_PERSONAL_ACCESS_TOKEN` and achieve full GitLab account takeover. This is the default configuration for Docker deployments. Version 2.1.27 contains a patch.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • sevenz-rust2: unchecked 7z entry paths permit traversal and absolute-path file overwritesAlso CWE-22

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 31, 2026
References
9 linked sources
Open source record