CVE-2025-9611: Microsoft Playwright MCP Server < 0.0.40 DNS Rebinding via Missing Origin Header Validation
Microsoft · Playwright
Vendor fix available · Affected: Microsoft Playwright · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 69% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Microsoft · Playwrightbefore 0.0.40
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Microsoft
- Published
- January 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2025-9611 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.