CVE-2025-9611

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 victims web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
UNKNOWN
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VulnCheckCNA
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 50%
Common Weakness Enumeration
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