CVE-2025-9611

N/A

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.

CVE Details

CVSS v3.1 ScoreN/A

Published1/7/2026

Last Modified1/8/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-749

References

https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3(disclosure@vulncheck.com)

https://github.com/microsoft/playwright/commit/1313fbd(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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