microsoft/playwright-mcp · Security
Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools
- GHSA ID
- GHSA-6fg3-hvw7-2fwq
- CVE ID
- CVE-2025-9611
- Severity
- high
- Published
- Updated
- CVSS v4
- 7.2 · 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
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.
CWEs
- CWE-749 · Exposed Dangerous Method or Function
References
- https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-9611 ↗
- https://github.com/microsoft/playwright/commit/1313fbd ↗
- https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation ↗
- https://github.com/microsoft/playwright-mcp/issues/1206 ↗
- https://msrc.microsoft.com/report/vulnerability/VULN-164412 ↗
- https://github.com/advisories/GHSA-6fg3-hvw7-2fwq ↗