CVE-2026-76345 Splunk CVE debrief

Who should care

Splunk Enterprise administrators and users with high-privilege roles should be aware of this vulnerability and take steps to mitigate it. Affected operators, platforms, and security teams should review official advisories, plan vendor-supported updates or mitigations, and monitor search head cluster member bundle REST API usage. Vulnerability management and security teams should prioritize patching and review compensating controls for exposed systems while remediation is scheduled and verified. This vulnerability can impact the integrity and availability of the Splunk deployment, and defenders should take steps to prevent potential remote code execution. Security teams should also track exceptions, retest remediated assets, and close the item only after evidence is documented. Additionally, defenders should check relevant monitoring, detection, and logs for exposed assets that need extra review. Asset inventory and configuration management teams should also be aware of the potential impact on their systems and take steps to mitigate the vulnerability. Rollback and change management processes should be reviewed to ensure that any changes to the system are properly validated and documented. Source tracking and monitoring should also be implemented to detect and respond to potential exploitation attempts. Overall, a coordinated effort is required across multiple teams to effectively mitigate this vulnerability and prevent potential remote code execution. The vulnerability management team should also review the affected scope and severity of the vulnerability to determine the appropriate level of response and mitigation. The security team should also review the vendor advisory and CVE record to validate affected scope, severity, and vendor guidance. The IT operations team should plan and implement vendor-supported updates or mitigations through normal change control where exposure is confirmed. Compensating controls should be reviewed and implemented for exposed systems while remediation is scheduled and verified. Monitoring and detection teams should check relevant monitoring, detection, and logs for exposed assets that need extra review. Asset inventory teams, IT

Technical summary

The search head cluster member bundle REST API in Splunk Enterprise versions below 10.4.2 does not enforce expected authorization boundaries or validate bundle paths, allowing users with high-privilege roles to write files to certain locations, potentially leading to remote code execution. This vulnerability affects Splunk Enterprise deployments with high-privilege roles, and defenders should prioritize patching to prevent potential remote code execution.

Defensive priority

Splunk Enterprise users should prioritize patching to prevent potential remote code execution.

Recommended defensive actions

• Apply patches for Splunk Enterprise versions below 10.4.2
• Restrict access to high-privilege Splunk roles
• Monitor search head cluster member bundle REST API usage
• 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 vulnerability exists in Splunk Enterprise versions below 10.4.2, allowing users with high-privilege roles to write files to certain locations via the search head cluster member bundle REST API, potentially leading to remote code execution. Evidence is based on official CVE and NVD records. Defenders should verify affected product deployments, review official advisories, and plan vendor-supported updates or mitigations.

Official resources