alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Rclone RC Set Options NoAuth Parameter Authentication Bypass Attempt (CVE-2026-41176)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:12; content:"/options/set"; http.request_body; content:"|7b 22|rc|22 3a 7b 22|NoAuth|22 3a|"; fast_pattern; pcre:"/^(?:true|false)\x7d\x7d$/R"; reference:url,github.com/projectdiscovery/nuclei-templates/blob/7e76d12b48f27f7803f9188e66220336aef87870/http/cves/2026/CVE-2026-41176.yaml; reference:cve,2026-41176; classtype:attempted-admin; sid:2069274; rev:1; metadata:affected_product Rclone_RC, attack_target Server, tls_state plaintext, created_at 2026_05_12, cve CVE_2026_41176, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_05_12, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)