CVE-2025-9611Published

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

Exact source revision recorded 8 Nov 2026 15:04:17 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2025-9611

Published

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.

Source published: 7 Jan 2026 04:24:13 UTC
Source modified: 8 Nov 2026 14:00:33 UTC
Observed here: 8 Nov 2026 15:04:17 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 7.2 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