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Splunk Enterprise PostgreSQL Recovery Endpoint Injection Artifacts

Detects CVE-2026-20253 exploit artifacts against the Splunk Enterprise PostgreSQL sidecar recovery endpoints via complementary signals. Where endpoint or Network Packet Capture request-body logging is available, the…

Description

Detects CVE-2026-20253 exploit artifacts against the Splunk Enterprise PostgreSQL sidecar recovery endpoints via complementary signals. Where endpoint or Network Packet Capture request-body logging is available, the rule matches PostgreSQL connection-string injection keywords, suspicious `backupFile` destinations, and known filesystem artifacts used to pivot from backup/restore primitives to file write or RCE. It also detects vulnerable recovery endpoint probing and empty-password Basic auth credentials observed in public exploit tooling.

Detection logic

Its licence does not clear it for publishing here

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Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
event_index

Known benign triggers

  • Authorized red-team or penetration testing tooling exercising the CVE-2026-20253 exploit chain. Legitimate Splunk user activity should not produce PostgreSQL connection-string keywords, suspicious filesystem targets, empty Basic auth credentials, or unauthenticated 400 responses on the recovery endpoints.

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