{"id":"CVE-2025-9611","revision":"f4c0771fb7d64866bb63b0e09d4f1c02","records":[{"revision":"f4c0771fb7d64866bb63b0e09d4f1c02","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-9611","aliases":[],"title":"Microsoft Playwright MCP Server < 0.0.40 DNS Rebinding via Missing Origin Header Validation","description":"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.","state":0,"publishedAt":"2026-01-07T04:24:13.705+00:00","modifiedAt":"2026-10-08T15:21:40.155+00:00","affected":[{"ecosystem":"Vendor product","name":"Playwright","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/%40playwright/mcp\",\n                    \"product\": \"Playwright\",\n                    \"repo\": \"https://github.com/microsoft/playwright\",\n                    \"vendor\": \"Microsoft\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"0.0.40\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.2,"severity":"HIGH"}],"references":["https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3","https://github.com/microsoft/playwright/commit/1313fbd","https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-9611","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-9611","identifiers":["CVE-2025-9611"]},"retained":false,"historicalAffected":[]}],"coverage":[]}