{"id":"CVE-2026-61560","sourceIdentifier":"security-advisories@github.com","published":"2026-09-15T22:16:58.040","lastModified":"2026-09-30T17:51:56.193","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"`@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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"zereight","product":"gitlab-mcp","versions":[{"version":"< 2.1.27","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-16T13:59:23.698471Z","id":"CVE-2026-61560","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-22"}]}],"references":[{"url":"https://github.com/zereight/gitlab-mcp/pull/482","source":"security-advisories@github.com"},{"url":"https://github.com/zereight/gitlab-mcp/pull/554","source":"security-advisories@github.com"},{"url":"https://github.com/zereight/gitlab-mcp/pull/622","source":"security-advisories@github.com"},{"url":"https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5","source":"security-advisories@github.com"},{"url":"https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-cv3r-c5h8-f4g5","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}