CVE-2025-9611

HIGH EPSS 53.4%
Published Jan 7, 20265mo ago · Modified Jun 17, 20261w ago
7.2 CVSS 4.0
High
Find Similar
Published Jan 7, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.2
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
53.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-749

References 3

  • github.com https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3
  • github.com https://github.com/microsoft/playwright/commit/1313fbd
  • vulncheck.com https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.