alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-55585 QWED parse_expr Code Injection via /verify/math expression"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/verify/math"; nocase; fast_pattern; http.request_body; content:"expression"; nocase; pcre:"/\x22expression\x22\s*:\s*\x22[^\x22]*(__import__|__builtins__|os\.system|subprocess|\beval\(|\bexec\()/i"; classtype:web-application-attack; reference:cve,CVE-2026-55585; reference:url,https://www.exploit.observer/?keyword=CVE-2026-55585&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=qwed&match=exact; sid:1095600; rev:1;)