alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Kestra OSS Unauthenticated OS Command Injection (CVE-2026-49869)"; flow:established,to_server; http.uri; content:"/api/v1/main/flows/configs"; http.request_body; content:"io.kestra.plugin.scripts.shell.Commands"; fast_pattern; content:"io.kestra.plugin.core.runner.Process"; content:"commands|3a|"; http.method; content:"PUT"; reference:url,github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx; reference:cve,2026-49869; classtype:web-application-attack; sid:2072320; rev:1; metadata:affected_product Kestra, attack_target Server, tls_state TLSDecrypt, created_at 2026_10_01, cve CVE_2026_49869, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_10_01, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)