CVE-2025-9611 (GCVE-0-2025-9611)
Vulnerability from cvelistv5 – Published: 2026-01-07 04:24 – Updated: 2026-10-08 15:21
VLAI
EPSS
VEX
Title
Microsoft Playwright MCP Server < 0.0.40 DNS Rebinding via Missing Origin Header Validation
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 14:24 UTC
CWE
- CWE-749 - Exposed Dangerous Method or Function
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/JLLeitschuh/security-research/… | vendor-advisory |
| https://github.com/microsoft/playwright/commit/1313fbd | patch |
| https://www.vulncheck.com/advisories/microsoft-pl… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Microsoft | Playwright |
Affected:
0 , < 0.0.40
(semver)
cpe:2.3:a:microsoft:playwright:*:*:*:*:*:*:*:* |
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