CVE-2026-76357 Splunk CVE debrief

Who should care

Splunk SOAR administrators, users with access to the REST API, and security teams responsible for monitoring and patching vulnerabilities should be aware of this vulnerability and take immediate action to mitigate its impact. This includes reviewing role assignments, restricting access to the REST API, and implementing compensating controls to monitor and limit file path submissions. Additionally, security teams should review and update their vulnerability management processes to ensure that similar vulnerabilities are addressed promptly in the future. Users with access to the REST API should be cautious when submitting file paths and report any suspicious activity to their security teams. The vulnerability's high CVSS score and potential for arbitrary code execution make it a high priority for affected organizations to address promptly and with caution, especially in environments where users have access to the REST API without assigned roles. Security teams should also consider implementing additional monitoring and logging to detect potential exploitation attempts. Furthermore, organizations should review their incident response plans to ensure they are prepared to respond to potential exploitation of this vulnerability. By taking these steps, organizations can reduce the risk associated with this vulnerability and protect their systems from potential exploitation. It is also recommended that organizations review their current role assignments and permissions to ensure that users do not have unnecessary access to the REST API. This can help prevent similar vulnerabilities from being exploited in the future. Overall, this vulnerability highlights the importance of proper role assignment and access controls in preventing unauthorized access and exploitation of sensitive systems and data. Therefore, it is essential that affected organizations take immediate action to address this vulnerability and prevent potential exploitation. The vulnerability's impact can be mitigated by implementing compensating controls, such as monitoring and limiting file path submissions, and by reviewing and updating role assignments and permissions. By taking these steps, organizations

Technical summary

The vulnerability exists in Splunk SOAR versions below 8.6.0, where an authenticated user with no role assigned can submit a crafted file path to the REST API and execute arbitrary code. This is possible because the REST API does not require an assigned role for the request and does not restrict the user-supplied file path to the intended temporary directory. The vulnerability has a high CVSS score due to its potential for arbitrary code execution.

Defensive priority

High priority due to high CVSS score and potential for arbitrary code execution.

Recommended defensive actions

• Inventory and verify the version of Splunk SOAR in use.
• Restrict access to the REST API for users without assigned roles.
• Implement compensating controls to monitor and limit file path submissions.
• Apply the vendor-provided patch or upgrade to version 8.6.0 or later.
• Review and update role assignments and permissions for users.

Evidence notes

The vulnerability exists because the REST API does not require an assigned role for the request and does not restrict the user-supplied file path to the intended temporary directory. More information can be found in the Splunk documentation. Evidence is limited to public sources and may not reflect the full scope or impact of this vulnerability. Defenders should verify affected systems, review access controls, and monitor for suspicious activity.

Official resources