ET EXPLOIT Rclone RC Set Options NoAuth Parameter Authentication Bypass Attempt (CVE-2026-41176)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri; bsize:12;
content:"/options/set";
http.request_body; strip_whitespace;
content:"|7b 22|rc|22 3a 7b 22|NoAuth|22 3a|"; fast_pattern;
pcre:"/^(?:true|false)\x7d\x7d$/R";
target:dest_ip;
Raw source ET EXPLOIT Rclone RC Set Options NoAuth Parameter Authentication Bypass Attempt (CVE-2026-41176) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET EXPLOIT Rclone RC Set Options NoAuth Parameter Authentication Bypass Attempt (CVE-2026-41176)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:12;
    content:"/options/set";
    http.request_body; strip_whitespace;
    content:"|7b 22|rc|22 3a 7b 22|NoAuth|22 3a|"; fast_pattern;
    pcre:"/^(?:true|false)\x7d\x7d$/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:2;
    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, tag Description_Generated_By_Proofpoint_Nexus, 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;
)

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