{"cve":"CVE-2026-61559","nvd":{"published":"2026-09-15T21:16:41.390","modified":"2026-09-30T17:51:56.193","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-918"],"references":["https://github.com/zereight/gitlab-mcp/commit/6ffb4cc70706fd05b1ab80901676bc2998b6db6d","https://github.com/zereight/gitlab-mcp/pull/625","https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.27","https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-2h44-8472-frjj","https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-2h44-8472-frjj"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-61559","score":0.00426,"percentile":0.36618,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-2h44-8472-frjj","url":"https://osv.dev/vulnerability/GHSA-2h44-8472-frjj","summary":"@zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery","modified":"2026-09-15T21:15:06.815575919Z","packages":[{"ecosystem":"npm","name":"@zereight/mcp-gitlab","purl":"pkg:npm/%40zereight/mcp-gitlab","ranges":[">=0.0.1 <2.1.27"],"fixed":["2.1.27"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}