ET WEB_SPECIFIC_APPS Flowise Authenticated Remote Code Execution (CVE-2026-46442)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Flowise Authenticated Remote Code Execution (CVE-2026-46442)";
    flow:established,to_server;
    http.uri;
    content:"/api/v1/node-custom-function"; fast_pattern;
    http.request_body; strip_whitespace;
    content:"child_process";
    content:"|2e|execSync|28|";
    http.method;
    content:"POST";
    reference:url,github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2;
    reference:cve,2026-46442;
    classtype:web-application-attack;
    sid:2071351; rev:1;
    metadata:affected_product Flowise, attack_target Server, tls_state TLSDecrypt, created_at 2026_07_31, cve CVE_2026_46442, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_31, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)