Denial of Service through coldToFrozen.sh Script in Splunk Enterprise

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Summary

CVECVE-2026-20240
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-20 18:16:26 UTC
Updated2026-05-21 19:40:59 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000530000 probability, percentile 0.167720000 (date 2026-05-27)

Problem Types: CWE-20 | CWE-20 The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Splunk Splunk All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Splunk Splunk Enterprise affected 10.2 10.2.2 custom Not specified
CNA Splunk Splunk Enterprise affected 10.0 10.0.5 custom Not specified
CNA Splunk Splunk Enterprise affected 9.4 9.4.11 custom Not specified
CNA Splunk Splunk Enterprise affected 9.3 9.3.12 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.4.2603 10.4.2603.1 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.3.2512 10.3.2512.9 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.2.2510 10.2.2510.11 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.1.2507 10.1.2507.21 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.0.2503 10.0.2503.13 custom Not specified
CNA Splunk Splunk Cloud Platform affected 9.3.2411 9.3.2411.129 custom Not specified

References

ReferenceSourceLinkTags
advisory.splunk.com/advisories/SVD-2026-0504 [email protected] advisory.splunk.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Alex Hordijk (hordalex) (en)

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