Permissive List of Allowed Inputs Affecting @apify/actors-mcp-server package, versions <0.9.21
Threat Intelligence
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-APIFYACTORSMCPSERVER-17816998
- published4 Jul 2026
- disclosed19 May 2026
- creditUnknown
Introduced: 19 May 2026
CVE-2026-46341 (opens in a new tab)How to fix?
Upgrade @apify/actors-mcp-server to version 0.9.21 or higher.
Overview
@apify/actors-mcp-server is an Apify MCP Server
Affected versions of this package are vulnerable to Permissive List of Allowed Inputs due to fetch-apify-docs tool validating URLs against a domain allowlist using String.startsWith() instead of proper URL hostname comparison. This allows bypass via attacker-controlled subdomains, enabling the tool to fetch and return arbitrary web content to the LLM.