CVE-2026-76296 Splunk CVE debrief

Who should care

Splunk Enterprise administrators and users with permissions to access and modify sourcetype renaming configurations should assess exposure and take necessary actions to prevent exploitation.

Why it matters

This vulnerability allows users without 'admin' or 'power' roles to create, move, edit, or delete sourcetype renaming configurations they own in apps they lack permission to access. Defenders should prioritize verifying and upgrading to patched versions, restricting access, and monitoring for unauthorized changes.

• Defenders need to verify and upgrade to patched versions to prevent exploitation.
• Restricting access to sensitive configurations and monitoring for unauthorized changes is crucial.
• Defenders should review and adjust user roles and permissions to prevent exploitation.
• Impact of exploitation could lead to unauthorized changes to sourcetype renaming configurations.

Technical summary

The vulnerability exists in Splunk Enterprise versions below 10.4.4, 10.2.8, 10.0.11, and 9.4.16. It allows users without 'admin' or 'power' roles to create, move, edit, or delete sourcetype renaming configurations they own in apps they lack permission to access when Splunk Web is enabled. This issue arises from a lack of proper permission checks in Splunk Web for sourcetype renaming operations. Defenders should focus on upgrading to patched versions, restricting access, and monitoring for unauthorized changes to mitigate this vulnerability.

Defensive priority

Defenders should prioritize verifying and upgrading to patched versions, restricting access to sensitive configurations, and monitoring for unauthorized changes.

Recommended defensive actions

• Verify and upgrade Splunk Enterprise to a patched version (10.4.4, 10.2.8, 10.0.11, or 9.4.16) if affected.
• Restrict access to sensitive configurations and monitor for unauthorized changes.
• Review and adjust user roles and permissions to prevent exploitation.
• Perform an inventory of affected systems and prioritize patching based on risk.
• Implement compensating controls for exposed systems while remediation is scheduled and verified.
• Monitor relevant logs for signs of exploitation or unauthorized changes.
• Track exceptions and retest remediated assets to ensure successful mitigation.

Evidence notes

The CVE record and Splunk advisory provide details on the vulnerability and affected versions. However, information on exploitation and impact is limited. Defenders should verify and upgrade to patched versions, restrict access, and monitor for unauthorized changes. The CVE Program record, NIST NVD detail page, and Splunk advisory offer additional context.

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.