alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-57573 Crawl4AI - Server-Side Request Forgery Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/crawl/stream"; nocase; fast_pattern; http.request_body; content:"urls"; nocase; content:"://"; classtype:web-application-attack; reference:cve,CVE-2026-57573; reference:url,https://www.exploit.observer/?keyword=CVE-2026-57573&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=crawl4ai&match=exact; sid:1087800; rev:1;)