Vulnerability · Published May 20, 2026 · Assigned by cisco
CVE-2026-20240Denial of Service through coldToFrozen.sh Script in Splunk Enterprise
High 7.1
In plain English
A high-severity improper input validation in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
In 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, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.2 – before 10.2.210.0 – before 10.0.59.4 – before 9.4.119.3 – before 9.3.12 |
| Splunk | Splunk Cloud Platform | 10.4.2603 – before 10.4.2603.110.3.2512 – before 10.3.2512.910.2.2510 – before 10.2.2510.1110.1.2507 – before 10.1.2507.2110.0.2503 – before 10.0.2503.139.3.2411 – before 9.3.2411.129 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H