alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Skyvern Authenticated SSTI Remote Code Execution (CVE-2025-49619)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/v1/workflows"; fast_pattern; http.request_body; content:"prompt"; content:"|7b|"; distance:0; pcre:"/((?<=(?:\x7b|\x24|\x23|\x7e|\x40|\x2a|\x25|\x5f))\x7b|\x7b(?:\x25|\x23|\x2f))[\x20-\x7e]+/"; reference:url,attackerkb.com/topics/4Hq1jtfYEq/cve-2025-49619; reference:cve,2025-49619; classtype:web-application-attack; sid:2064150; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_08_25, cve CVE_2025_49619, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)