Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.012, the 68th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 7 Jan 2026. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-6fg3-hvw7-2fwq
• OSV: GHSA-6fg3-hvw7-2fwq
• github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3
• nvd.nist.gov/vuln/detail/CVE-2025-9611
• github.com/microsoft/playwright-mcp/issues/1206
• github.com/microsoft/playwright/commit/1313fbd
• github.com/microsoft/playwright-mcp
• msrc.microsoft.com/report/vulnerability/VULN-164412
• www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.