ET WEB_SPECIFIC_APPS Splunk Enterprise PostgreSQL Sidecar Service API via SplunkWeb Arbitrary File Create (CVE-2026-20253)

SID: 2069929Rev: 12 views

Fileemerging-web_specific_apps.rules

CreatedJune 15, 2026

UpdatedJune 15, 2026

Classificationweb-application-attack

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Splunk Enterprise PostgreSQL Sidecar Service API via SplunkWeb Arbitrary File Create (CVE-2026-20253)"; flow:established,to_server; http.uri; content:"/splunkd/__raw/v1/postgres/recovery/backup"; fast_pattern; http.request_body; content:"|22|backupFile|22 3a|"; pcre:"/^\s*\x22[^\x22]*?(?:(?:\x2e|%+(?:25)?2[Ee]|%+(?:25)?32%+(?:25)?[46]5){1,2}(?:\x2f|\x5c|%+(?:25)?(?:25)?5[Cc]|%+(?:25)?2[Ff]){1,}){2,}/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:2069929; 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, deployment SSLDecrypt, 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;)

References

url	labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/

Metadata

affected productSplunk

attack targetServer

tls stateTLSDecrypt

created at2026_06_15

cve

CVE-2026-20253

deploymentSSLDecrypt

confidenceHigh

signature severityMajor

tagExploit

updated at2026_06_15

mitre tactic idTA0001

mitre tactic nameInitial_Access

mitre technique idT1190

mitre technique nameExploit_Public_Facing_Application

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