Exposed Dangerous Method or Function Affecting playwright package, versions <1.56.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-PLAYWRIGHT-14888269
- published7 Jan 2026
- disclosed7 Jan 2026
- creditJonathan Leitschuh
Introduced: 7 Jan 2026
CVE-2025-9611 (opens in a new tab)How to fix?
Upgrade playwright to version 1.56.0 or higher.
Overview
playwright is an A high-level API to automate web browsers
Affected versions of this package are vulnerable to Exposed Dangerous Method or Function via missing validation of the Origin header on incoming connections. An attacker can gain unauthorized access to locally running endpoints by leveraging DNS rebinding through a victim’s web browser.
PoC
> curl -N http://127.0.0.1:8931/mcp \
-H "Origin: attacker.com" \
-H "Content-Type: application/json" \
-H "Accept: text/event-stream application/json" \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "initialize",
"params": {
"protocolVersion": "2025-03-26",
"capabilities": {
"roots": {
"listChanged": true
},
"sampling": {}
},
"clientInfo": {
"name": "ExampleClient",
"version": "1.0.0"
}
}
}'