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Advisories

Microsoft Playwright MCP Server < 0.0.40 DNS Rebinding via Missing Origin Header Validation

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severity
high
date
Affecting

  • Playwright < 0.0.40

CWE
  • CWE-749 Exposed Dangerous Method or Function
CVSS
7.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L
Credit
Jonathan Leitschuh
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.

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