CVE-2026-76387 SPL Injection through the REST API in Splunk Enterprise Security
Attackers with specific roles can inject SPL via REST API filters to access sensitive data and execute code within scheduled searches.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76387?
CVE-2026-76387 is a high-severity code injection vulnerability in Splunk Enterprise Security, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Splunk Enterprise Security versions below 8.6.1, a user who holds a Splunk Enterprise Security role that contains the mc_investigation_read capability could inject Search Processing Language (SPL) through Analyst Queue search filters, allowing for access to all relevant data and system integrity available to the scheduled searches that run for that user. The vulnerability is possible because the Analyst Queue search filter handling does not validate filter field names before the fields are included in SPL searches. For more information see Users and roles for Splunk Enterprise Security (https://help.splunk.com/en/splunk-enterprise-security-8/install/8.4/installation/users-and-roles-for-splunk-enterprise-security), Manage analyst workflows using the analyst queue in Splunk Enterprise Security (https://help.splunk.com/en/splunk-enterprise-security-8/administer/8.4/mission-control/manage-analyst-workflows-using-the-analyst-queue-in-splunk-enterprise-security), and Overview of Mission Control in Splunk Enterprise Security (https://help.splunk.com/en/splunk-enterprise-security-8/user-guide/8.5/mission-control/overview-of-mission-control-in-splunk-enterprise-security) in the Splunk documentation.
Weakness: CWE-20
Which versions are affected by CVE-2026-76387?
It affects 1 product.
Products include Splunk Enterprise Security.
How do I fix CVE-2026-76387?
No fix has been published for CVE-2026-76387 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-76387 being exploited?
There is no known exploitation of CVE-2026-76387 in the wild and no public exploit code.
Other vulnerabilities in Splunk Enterprise Security
- CVE-2026-76388 Privilege Escalation through Search Macro Permissions in Splunk Enterprise Security
- CVE-2024-22165 Denial of Service in Splunk Enterprise Security of the Investigations manager through Investigation creation
- CVE-2024-22164 Denial of Service of an Investigation in Splunk Enterprise Security through Investigation attachments
Sources
Also known as GHSA-p274-gc4j-gjpj.