CVE-2026-76306 Splunk CVE debrief

Who should care

Defenders responsible for Splunk SOAR deployments, especially those with users holding the 'Observer' role, should assess exposure and apply patches or compensating controls as needed. This includes verifying the version of Splunk SOAR, restricting access to REST API query filters, and monitoring for potential exploitation attempts. The vulnerability can lead to unauthorized access or privilege escalation, making it essential for defenders to prioritize

Why it matters

This vulnerability allows users with the 'Observer' role to infer sensitive information, potentially leading to unauthorized access or privilege escalation in Splunk SOAR deployments.

• Verify exposure of sensitive information for users with the 'Observer' role
• Assess potential for unauthorized access to user accounts
• Prioritize patching for Splunk SOAR versions below 8.7.0
• Monitor for potential exploitation attempts

Technical summary

The vulnerability allows users with the 'Observer' role to infer password hashes and authorization tokens for other users through REST API query filters in Splunk SOAR versions below 8.7.0. This is due to the improper application of query filters to user records before protecting sensitive fields, potentially leading to unauthorized access or privilege escalation in Splunk SOAR deployments. The issue can be mitigated by applying patches or compensating controls to restrict access to sensitive information. Defenders should prioritize verifying exposure and applying patches for Splunk SOAR versions below 8.7.0.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Splunk SOAR versions below 8.7.0, especially for users with the 'Observer' role.

Recommended defensive actions

• Verify Splunk SOAR version and apply patches if necessary
• Restrict access to REST API query filters for users with the 'Observer' role
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, but additional verification is needed to confirm affected versions and remediation steps. The vulnerability is confirmed in Splunk SOAR versions below 8.7.0, and defenders should verify exposure and apply patches or compensating controls as needed. The information disclosure is possible due to the improper application of REST API query filters to user records before protecting sensitive fields.

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.