Apify Model Context Protocol (MCP) server: Domain Allowlist Bypass in fetch-apify-docs via String Prefix Matching
Summary The fetch-apify-docs tool validates URLs against a domain allowlist using String.startsWith instead of proper URL hostname comparison. This allows bypass via attacker-controlled subdomains e.g., https://docs.apify.com.evil.com/, enabling the tool to fetch and return arbitrary web content ...