alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"VEDAS CVE-2026-82477 MITRE SAF Heimdall - Server-Side Request Forgery"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/tenable/login"; nocase; fast_pattern; http.request_body; content:"host_url"; nocase; content:"://"; classtype:web-application-attack; reference:cve,CVE-2026-82477; reference:url,https://www.exploit.observer/?keyword=CVE-2026-82477&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=heimdall&match=exact; sid:1071606; rev:1;)