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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Playwright | < 0.0.40 | 0.0.40 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | @playwright/mcp | < 0.0.40 | 0.0.40 | GHSA-6fg3-hvw7-2fwq |