{"id":"CVE-2026-44895","aliases":["GHSA-8jr5-6gvj-rfpf"],"url":"https://o3.security/vulnerability/CVE-2026-44895","summary":"GitLab MCP Server: SSE transport has no authentication and wildcard CORS, exposing all GitLab tools","details":"GitLab MCP Server lets an AI agent talk directly to GitLab. Prior to 0.6.0, the HTTP transport in src/transport.ts ships with no authentication layer at all and a wildcard Access-Control-Allow-Origin: * on every response. The structural defect is that the SSE server stands up a stateful, mutation-capable RPC endpoint that is backed by the operator's GITLAB_PERSONAL_ACCESS_TOKEN without any inbound credential check, then advertises itself to every cross-origin browser context via the wildcard CORS header. The httpServer.listen(port) call at line 97 also passes no host argument, so the bind defaults to 0.0.0.0 and exposes the auth-less surface on every interface. This vulnerability is fixed in 0.6.0.","published":"2026-05-26T21:08:13.107Z","modified":"2026-08-07T11:31:18.687575060Z","cvss":null,"epss":{"score":0.00392,"percentile":0.32011,"asOf":"2026-08-08"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@yoda.digital/gitlab-mcp-server","fixedVersion":"0.6.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44895.json"},{"type":"ADVISORY","url":"https://github.com/yoda-digital/mcp-gitlab-server/security/advisories/GHSA-8jr5-6gvj-rfpf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44895"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:18.687575060Z"}}