alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Node.js n8n Authenticated Workflow Expression Injection (CVE-2025-68613)"; flow:established,to_server; http.uri; content:"/rest/workflows"; fast_pattern; startswith; http.cookie; content:"n8n-auth|3d|"; nocase; http.request_body; content:"|22|value|22 3a|"; pcre:"/^\s*\x22[^\x22]*?\x3d\x7b{2}/R"; reference:url,github.com/n8n-io/n8n/security/advisories/GHSA-v98v-ff95-f3cp; reference:cve,2025-68613; classtype:web-application-attack; sid:2066448; rev:2; metadata:affected_product Node_js, attack_target Server, tls_state TLSDecrypt, created_at 2025_12_23, cve CVE_2025_68613, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2026_01_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)