{"id":"CVE-2025-9611","aliases":["EUVD-2026-1179","GHSA-6fg3-hvw7-2fwq","GHSA-8rgw-6xp9-2fg3"],"status":"published","title":"Microsoft Playwright MCP Server \u003c 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.","severity":{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01222,"percentile":0.68974,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-749"],"published":"2026-01-07T04:24:13Z","modified":"2026-11-08T14:00:33Z","fixes":[{"ecosystem":"npm","package":"@playwright/mcp","fixed_in":["0.0.40"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@playwright/mcp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.40"}]}]},{"source":"osv","ecosystem":"npm","package":"@playwright/mcp","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.40"}]}]}],"products":[{"vendor":"microsoft","product":"playwright"}],"references":[{"url":"https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3","tags":["vendor-advisory","advisory","web"]},{"url":"https://github.com/microsoft/playwright/commit/1313fbd","tags":["patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation","tags":["third-party-advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-9611","tags":["advisory"]},{"url":"https://github.com/microsoft/playwright-mcp/issues/1206","tags":["web"]},{"url":"https://msrc.microsoft.com/report/vulnerability/VULN-164412","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6fg3-hvw7-2fwq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9611.json","tags":["advisory"]},{"url":"https://github.com/microsoft/playwright","tags":["package"]},{"url":"https://github.com/microsoft/playwright-mcp","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-9611","title":"Microsoft Playwright MCP Server \u003c 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.","status":"published","published":"2026-01-07T04:24:13.705Z","modified":"2026-11-08T14:00:33.786Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna"}],"cwes":["CWE-749"],"updated_at":"2026-11-08T14:43:22.764053Z"}],"euvd":[{"id":"EUVD-2026-1179","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.","status":"published","published":"2026-01-07T04:24:13Z","modified":"2026-11-08T14:00:33Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"updated_at":"2026-11-08T15:13:10.25084Z"}],"ghsa":[{"id":"GHSA-6fg3-hvw7-2fwq","title":"Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools","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.","status":"published","published":"2026-01-07T12:31:25Z","modified":"2026-01-07T20:02:56Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-749"],"updated_at":"2026-11-02T14:39:16.156387Z"}],"nvd":[{"id":"CVE-2025-9611","description":"Microsoft Playwright MCP Server versions prior to 0.0.40 fails to validate the Origin header on incoming connections. 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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.","status":"published","published":"2026-01-07T04:24:13.705Z","modified":"2026-11-09T02:30:52.765903013Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-749"],"updated_at":"2026-11-09T03:16:44.651171Z"},{"id":"GHSA-6fg3-hvw7-2fwq","title":"Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools","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.","status":"published","published":"2026-01-07T12:31:25Z","modified":"2026-02-03T03:16:20.816333Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-749"],"updated_at":"2026-11-02T15:46:39.618611Z"}]}}