CVE-2026-76273: Improper Input Validation through the collect Command in Splunk Enterprise
In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a user that holds a role with the runcollect capability could use the collect Search Processing Language (SPL) command to add attacker-controlled content to system-level messages on the Splunk platform instance. The vulnerability is possible because the collect command does not validate the index name before processing the value. For more information see collect (https://help.splunk.com/en/splunk-enterprise/search/spl-search-reference/10.4/search-commands/collect), Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities), and System endpoint descriptions (https://help.splunk.com/en/splunk-enterprise/rest-api-reference/10.4/system-endpoints/system-endpoint-descriptions) in the Splunk documentation.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.4.3
Event History
Frequently Asked Questions
Which users can exploit this issue?
A user must hold a Splunk role with the run_collect capability. The issue can be exploited remotely with low privileges and does not require user interaction.
What impact can successful exploitation have?
An authorized user with the required capability can add attacker-controlled content to system-level messages on the Splunk platform instance. The provided severity vector indicates integrity impact only, with no stated confidentiality or availability impact.
Which Splunk Enterprise versions are affected?
Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 are affected.
What can be done while patching is pending?
Review roles assigned the run_collect capability and remove that capability from users who do not require the collect SPL command. This limits exploitation to only necessary trusted roles.