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.

INFO

Published Date :

2026-01-07T04:24:13.705Z

Last Modified :

2026-03-05T01:30:00.974Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2025-9611 vulnerability.

Vendors Products
Microsoft
  • Playwright
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-9611.

URL Resource
https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3 cve-icon cve-icon
https://github.com/microsoft/playwright/commit/1313fbd cve-icon cve-icon
https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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