{"id":"CVE-2025-9611","summary":"Microsoft Playwright MCP Server \u003c 0.0.40 DNS Rebinding via Missing Origin Header Validation","details":"Microsoft Playwright MCP Server versions prior to 0.0.40 fails to validate the Origin header on incoming connections. This allows an attacker to perform a DNS rebinding attack via a victim’s web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.","aliases":["GHSA-6fg3-hvw7-2fwq","GHSA-8rgw-6xp9-2fg3"],"modified":"2026-08-12T03:51:27.714352939Z","published":"2026-01-07T04:24:13.705Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9611.json","unresolved_ranges":[{"extracted_events":[{"fixed":"0.0.40"}],"source":"AFFECTED_FIELD"},{"source":"CPE_FIELD","extracted_events":[{"fixed":"0.0.40"}]}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-749"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9611.json"},{"type":"ADVISORY","url":"https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-9611"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation"},{"type":"FIX","url":"https://github.com/microsoft/playwright/commit/1313fbd"},{"type":"PACKAGE","url":"https://github.com/microsoft/playwright"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/microsoft/playwright","events":[{"introduced":"0"},{"fixed":"1313fbd"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-9611.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L"}]}