alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
msg:"ET WEB_SPECIFIC_APPS TYPO3 CMS ceselector Extension Object Injection via Insecure Deserialization (CVE-2026-46725)";
flow:established,to_server;
http.cookie;
content:"T3_ceselector_";
pcre:"/^\d+\x3d[a-zO]%3[aA](?:%2[bB])?\d+%3[aA](?:[a-z]?%3[aA]\d+(?:%3[aA])?(?:%7[bB])?|%22.+%22|%3[bB]|%7[dD])+/R";
reference:url,github.com/projectdiscovery/nuclei-templates/blob/f53616baf9fa1bf3faccb24f49d508c16b0d0c87/http/cves/2026/CVE-2026-46725.yaml;
reference:cve,2026-46725;
classtype:web-application-attack;
sid:2069468; rev:1;
metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_05_28, cve CVE_2026_46725, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_05_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
target:dest_ip;
)