HIGH
GHSA-6fg3-hvw7-2fwq
Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools
Quick fix
GHSA-6fg3-hvw7-2fwq — @playwright/mcp: upgrade to the fixed version with the command below.
npm install @playwright/mcp@0.0.40Details
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.
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Affected packages
References
- https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-9611[ADVISORY]
- https://github.com/microsoft/playwright-mcp/issues/1206[WEB]
- https://github.com/microsoft/playwright/commit/1313fbd[WEB]
- https://github.com/microsoft/playwright-mcp[PACKAGE]
- https://msrc.microsoft.com/report/vulnerability/VULN-164412[WEB]
- https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation[WEB]