Denial of Service in Splunk Archiver coldToFrozen.sh
CVE-2026-20240 is an improper input validation vulnerability in the Splunk Archiver app affecting Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129. The flaw is in the coldToFrozen.sh script used by the splunk_archiver application. The script accepts arbitrary file path input and renames paths without validating that operations are limited to intended safe directories. A low-privileged authenticated user who does not have the admin or power Splunk roles can abuse this behavior to rename critical Splunk directories, breaking normal platform operation and rendering the instance non-functional.
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A denial-of-service vulnerability in the Splunk Archiver app caused by improper input validation in coldToFrozen.sh, enabling low-privileged users to rename critical directories and disrupt Splunk operation.
An improper input validation vulnerability in Splunk Enterprise's data archiving infrastructure that allows a low-privileged user to manipulate the coldToFrozen.sh script in the splunk_archiver application and cause a complete denial of service by renaming critical system directories.
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