ET WEB_SPECIFIC_APPS Gitea Container Registry Unauthorized Private Image Access (CVE-2026-27771)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Gitea Container Registry Unauthorized Private Image Access (CVE-2026-27771)";
    flow:established,to_server;
    http.request_line;
    content:"GET /v2/token?"; fast_pattern; startswith;
    content:"service|3d|container_registry";
    content:"scope|3d 2a|";
    reference:url,orca.security/resources/blog/gitea-container-registry-vulnerability/;
    reference:cve,2026-27771;
    classtype:web-application-attack;
    sid:2069653; rev:1;
    metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_06_04, cve CVE_2026_27771, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_06_04, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)