{"id":"CVE-2026-61559","revision":"4a12fc1e72ee48a7bd036ae56d17154b","records":[{"revision":"4a12fc1e72ee48a7bd036ae56d17154b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-61559","aliases":[],"title":"@zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery","description":"`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Starting in version 0.0.1 and prior to version 2.1.27, when the environment variable `ENABLE_DYNAMIC_API_URL=true` is set, the server reads the `X-GitLab-API-URL` HTTP request header and uses it as the base URL for all outbound GitLab API calls made within that request. The server validates that the value is a well-formed URL (`new URL(dynamicApiUrl)`) but applies no allowlist or hostname restriction. The server then attaches the victim's `Private-Token` to every outbound fetch that uses the redirected URL. Any caller who can reach the HTTP transport can set `X-GitLab-API-URL` to an attacker-controlled host. The next GitLab API call the server makes delivers the victim's token to that host. Version 2.1.27 contains a patch.","state":0,"publishedAt":"2026-09-15T20:58:41.639+00:00","modifiedAt":"2026-09-17T16:50:15.672+00:00","affected":[{"ecosystem":"Vendor product","name":"gitlab-mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"zereight\",\n                    \"product\": \"gitlab-mcp\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.0.1, < 2.1.27\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","score":9.6,"severity":"CRITICAL"}],"references":["https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-2h44-8472-frjj","https://github.com/zereight/gitlab-mcp/pull/625","https://github.com/zereight/gitlab-mcp/commit/6ffb4cc70706fd05b1ab80901676bc2998b6db6d","https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.27"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61559","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-61559","identifiers":["CVE-2026-61559"]},"retained":false,"historicalAffected":[]}],"coverage":[]}