ET WEB_SPECIFIC_APPS Splunk Enterprise PostgreSQL Sidecar Service API via SplunkWeb Parameter Injection (CVE-2026-20253)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Splunk Enterprise PostgreSQL Sidecar Service API via SplunkWeb Parameter Injection (CVE-2026-20253)";
    flow:established,to_server;
    http.uri;
    content:"/splunkd/__raw/v1/postgres/"; fast_pattern;
    http.request_body;
    content:"|22|database|22 3a|";
    pcre:"/^\s*\x22[^\x22]*?(?:host(?:addr)?|dbname|port|user|password|passfile)\x3d/R";
    http.method;
    content:"POST";
    reference:url,labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/;
    classtype:web-application-attack;
    sid:2069930; rev:1;
    metadata:affected_product Splunk, attack_target Server, tls_state TLSDecrypt, created_at 2026_06_15, cve CVE_2026_20253, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_06_15, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)