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CVE

CVE-2026-61560

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

CVE-2026-61560

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

@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 GITLABPERSONALACCESS_TOKEN and achieve full GitLab account takeover. This is the default configuration for Docker deployments. Version 2.1.27 contains a patch.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61560.json, https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5, https://nvd.nist.gov/vuln/detail/CVE-2026-61560, https://github.com/zereight/gitlab-mcp/pull/482, https://github.com/zereight/gitlab-mcp/pull/554, https://github.com/zereight/gitlab-mcp/pull/622

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.02901%
EPSS Percentile
0.86543%
Introduced Version
0
Fix Available
b5b4c3370f8ef366d3e7a1ba43aebedc014f0b08

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