Medium severity · published May 20, 2026
CVE-2026-20240
Denial of Service through coldToFrozen.sh Script in Splunk Enterprise
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Splunk Cloud Platform · Splunk
10.4.2603 before 10.4.2603.1; 10.3.2512 before 10.3.2512.9; 10.2.2510 before 10.2.2510.11; 10.1.2507 before 10.1.2507.21; 10.0.2503 before 10.0.2503.13; 9.3.2411 before 9.3.2411.129 · source: vendor, NVD
SE
Splunk Enterprise · Splunk
10.2 before 10.2.2; 10.0 before 10.0.5; 9.4 before 9.4.11; 9.3 before 9.3.12 · source: vendor
SP
Splunk · Splunk
9.3.0 before 9.3.12; 9.4.0 before 9.4.11; 10.0.0 before 10.0.5; 10.2.0 before 10.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20240
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20240
Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2026-0504
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