High [CVE-2026-76298] Use of Hard-coded Cryptographic Key in the PostgreSQL Sidecar Service in Splunk Enterprise
This high-severity Splunk advisory covers CVE-2026-76298 affecting Splunk Enterprise.
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Summary
In Splunk Enterprise versions below 10.4.4 and 10.2.8, a user who does not hold the "admin" or "power" Splunk roles could derive the PostgreSQL sidecar database superuser password and run arbitrary operating system commands as the user account running Splunk Enterprise on search head cluster members.
The vulnerability is possible because the PostgreSQL sidecar service derives a privileged database password from the search head cluster identifier that appears in search job logs. For more information see About configuring role-based user access ( ), server.conf ( ), and Sidecar configuration settings ( ) in the Splunk documentation.
- Splunk Enterprise 10.4 before 10.4.4
- Splunk Enterprise 10.2 before 10.2.8
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
- 10.4.4
- 10.2.8
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 10.4.4, 10.2.8. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
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