{"id":"GHSA-6fg3-hvw7-2fwq","summary":"Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools","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":["CVE-2025-9611","GHSA-8rgw-6xp9-2fg3"],"modified":"2026-02-03T03:16:20.816333Z","published":"2026-01-07T12:31:25Z","database_specific":{"nvd_published_at":"2026-01-07T12:17:06Z","cwe_ids":["CWE-749"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-01-07T20:02:55Z"},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/microsoft/playwright-mcp/issues/1206"},{"type":"WEB","url":"https://github.com/microsoft/playwright/commit/1313fbd"},{"type":"PACKAGE","url":"https://github.com/microsoft/playwright-mcp"},{"type":"WEB","url":"https://msrc.microsoft.com/report/vulnerability/VULN-164412"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation"}],"affected":[{"package":{"name":"@playwright/mcp","ecosystem":"npm","purl":"pkg:npm/%40playwright/mcp"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.40"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-6fg3-hvw7-2fwq/GHSA-6fg3-hvw7-2fwq.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"}]}