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.
History

Wed, 07 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 07 Jan 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft playwright
Vendors & Products Microsoft
Microsoft playwright

Wed, 07 Jan 2026 04:45:00 +0000

Type Values Removed Values Added
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.
Title Microsoft Playwright MCP Server < 0.0.40 DNS Rebinding via Missing Origin Header Validation
Weaknesses CWE-749
References
Metrics cvssV4_0

{'score': 7.2, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-01-07T04:24:13.705Z

Updated: 2026-01-07T14:25:19.390Z

Reserved: 2025-08-28T15:34:36.069Z

Link: CVE-2025-9611

cve-icon Vulnrichment

Updated: 2026-01-07T14:25:14.799Z

cve-icon NVD

Status : Received

Published: 2026-01-07T12:17:06.697

Modified: 2026-01-07T12:17:06.697

Link: CVE-2025-9611

cve-icon Redhat

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