CVE-2025-9611
January 07, 2026
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.
Affected Packages
@playwright/mcp (NPM):
Affected version(s) >=0.0.1 <0.0.40Fix Suggestion:
Update to version 0.0.40@playwright/mcp (NPM):
Affected version(s) >=0.0.1 <0.0.40Fix Suggestion:
Update to version 0.0.40https://github.com/microsoft/playwright.git (SCM_GIT):
Affected version(s) >=v1.23.2 <v1.56.0Fix Suggestion:
Update to version v1.56.0Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
LOW
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Exposed Dangerous Method or Function
EPSS
Base Score:
0.18
