CVE-2026-76338 Splunk CVE debrief

Who should care

Splunk Enterprise administrators and users, security teams monitoring for potential administrative session token forgery attacks, and operators responsible for maintaining system integrity and service availability should prioritize patching vulnerable versions to prevent potential attacks. Additionally, security teams should review compensating controls for exposed systems while remediation is scheduled and verified. Asset inventory and configuration management teams should also be aware of the vulnerability and its potential impact on their systems. Furthermore, incident response teams should be prepared to respond to potential attacks and have a plan in place to address affected systems. IT teams responsible for change management and patching should ensure that affected systems are updated or mitigated according to vendor guidance. Lastly, audit and compliance teams should verify that appropriate measures are taken to address the vulnerability and ensure compliance with organizational policies and regulatory requirements. The distributed search authentication token endpoint does not require a signed request to identify a configured search peer, allowing the request to fall back to shared local key material, which increases the attack surface for unauthenticated users with access to a trusted distributed search private key. Therefore, it is crucial for organizations to restrict access to distributed search private keys and monitor for unusual activity related to distributed search authentication. By taking these steps, organizations can reduce the risk of a successful attack and protect their systems from potential harm. The CVE record was published on 2026-08-19T22:17:18.360Z and has not been modified since then. The NVD entry is currently Analyzed, providing additional context and details about the vulnerability. To ensure the security and integrity of their systems, organizations should prioritize patching vulnerable versions and implement additional security measures to prevent potential attacks. This includes reviewing and updating incident response plans, conducting thorough risk assessments, and ensuring that all necessary controls are in place to detect

Technical summary

The vulnerability exists in Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14. An unauthenticated user with access to a trusted distributed search private key could forge an administrative session token, access all relevant data, affect system integrity, and disrupt service availability. The distributed search authentication token endpoint does not require a signed request to identify a configured search peer, allowing the request to fall back to shared local key material.

Defensive priority

Organizations using Splunk Enterprise should prioritize patching vulnerable versions to prevent potential administrative session token forgery.

Recommended defensive actions

• Inventory and update Splunk Enterprise to version 10.4.2, 10.2.6, 10.0.9, or 9.4.14
• Restrict access to distributed search private keys
• Monitor for unusual activity related to distributed search authentication
• 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, 10.2.6, 10.0.9, and 9.4.14. An unauthenticated user with access to a trusted distributed search private key could forge an administrative session token, access all relevant data, affect system integrity, and disrupt service availability. The distributed search authentication token endpoint does not require a signed request to identify a configured search peer, allowing the request to fall back to shared local key material.

Official resources