{"cve":"CVE-2026-54504","nvd":{"published":"2026-09-17T19:16:50.517","modified":"2026-09-30T17:51:56.193","status":"Deferred","description":"MCP Documentation Server is a local-first document management and semantic search server for AI coding agents. From 1.13.0 until 1.13.1, the automatically started Web UI in src/server.ts calls startWebServer in src/web-server.ts with START_WEB_UI enabled by default and WEB_PORT set to 3080. startWebServer uses app.listen(PORT) without a host, which binds the unauthenticated document-management API to all interfaces rather than localhost. A network-reachable client can invoke GET /api/documents, GET /api/documents/:id, POST /api/documents, POST /api/search-all, DELETE /api/documents/:id, and GET /api/config without credentials to enumerate and read documents, search the corpus, insert or delete documents, and tamper with the MCP assistant's knowledge base. The service must be reachable from the attacker's LAN, VM network, container bridge, VPN, or another routed network, and the issue does not provide remote code execution. This issue is fixed in 1.13.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-306","CWE-668"],"references":["https://github.com/andrea9293/mcp-documentation-server/commit/37159d4e06b8ee50c3645b2496e3d3f6d32c47f9","https://github.com/andrea9293/mcp-documentation-server/pull/20","https://github.com/andrea9293/mcp-documentation-server/releases/tag/v1.13.1","https://github.com/andrea9293/mcp-documentation-server/security/advisories/GHSA-6f5r-5672-72j7","https://github.com/andrea9293/mcp-documentation-server/security/advisories/GHSA-6f5r-5672-72j7"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-54504","score":0.00573,"percentile":0.4705,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6f5r-5672-72j7","url":"https://osv.dev/vulnerability/GHSA-6f5r-5672-72j7","summary":"@andrea9293/mcp-documentation-server: Web UI API binds to all interfaces without authentication by default","modified":"2026-07-15T23:41:41.409498Z","packages":[{"ecosystem":"npm","name":"@andrea9293/mcp-documentation-server","purl":"pkg:npm/%40andrea9293/mcp-documentation-server","ranges":[">=1.13.0 <1.13.1"],"fixed":["1.13.1"]}]}],"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."]}