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CVE-2025-9611
Published: Jan 7, 2026
Modified: Mar 5, 2026
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
Microsoft | Playwright | affected 0 - < 0.0.40 |
Weaknesses (CWE)
References
https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3
technical-description
exploit
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