CVE-2026-76298 Splunk CVE debrief

Who should care

Splunk Enterprise administrators and users with access to search head cluster members should assess their exposure and take necessary actions to mitigate the vulnerability. This includes verifying the version of Splunk Enterprise, applying patches or mitigations, and reviewing role-based user access configurations. Additionally, security teams and vulnerability management teams should be aware of the potential impact and prioritize verification and patch/

Why it matters

This vulnerability allows a user without 'admin' or 'power' roles to 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. Defenders should prioritize verifying exposure in affected versions and applying patches or mitigations as recommended by Splunk.

• Potential unauthorized access to Splunk Enterprise systems
• Possible execution of arbitrary operating system commands
• Required verification of exposure in affected versions
• Necessity to review and update role-based user access configurations

Technical summary

The PostgreSQL sidecar service in Splunk Enterprise derives a privileged database password from the search head cluster identifier that appears in search job logs. This allows a user without 'admin' or 'power' roles to derive the password and run arbitrary operating system commands as the user account running Splunk Enterprise on search head cluster members. The vulnerability affects Splunk Enterprise versions below 10.4.4 and 10.2.8. To mitigate, defenders should prioritize verifying exposure in affected versions and applying patches or mitigations as recommended by Splunk.

Defensive priority

Defenders should prioritize verifying exposure in Splunk Enterprise versions below 10.4.4 and 10.2.8, and applying patches or mitigations as recommended by Splunk.

Recommended defensive actions

• Verify Splunk Enterprise version and check if it is affected
• Apply patches or mitigations recommended by Splunk
• Monitor search head cluster members for suspicious activity
• Review and update role-based user access configurations
• Perform vulnerability scanning to identify potential exposure
• Implement additional logging and monitoring for search head cluster members
• Review system configurations for potential weaknesses

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and potential impact. However, additional information from official sources, such as Splunk's advisory, may be necessary to fully understand the vulnerability and develop effective mitigations.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.