alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"VEDAS CVE-2026-54544 Fireshare SSRF"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/test-webhook"; nocase; http.request_body; content:"webhook_url"; nocase; content:"://"; distance:0; classtype:web-application-attack; reference:cve,CVE-2026-54544; reference:url,https://www.exploit.observer/?keyword=CVE-2026-54544&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=fireshare&match=exact; sid:1072400; rev:1;)