CVE-2026-20240: Denial of Service through coldToFrozen.sh Script in Splunk Enterprise

Published May 20, 2026
·
Updated

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 splunkarchiver 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 Software

12 affected components
Splunk Splunk Enterprise<10.2.2, <10.0.5, <9.4.11, <9.3.12
Splunk Splunk Cloud Platform<10.4.2603.1, <10.3.2512.9, <10.2.2510.11, <10.1.2507.21, <10.0.2503.13, <9.3.2411.129
Splunk splunk>=9.3.0<9.3.12
Splunk splunk>=9.4.0<9.4.11
Splunk splunk>=10.0.0<10.0.5
Splunk splunk>=10.2.0<10.2.2
Splunk Splunk Cloud Platform>=9.3.2411<9.3.2411.129
Splunk Splunk Cloud Platform>=10.0.2503<10.0.2503.13
Splunk Splunk Cloud Platform>=10.1.2507<10.1.2507.21
Splunk Splunk Cloud Platform>=10.2.2510<10.2.2510.11
Splunk Splunk Cloud Platform>=10.3.2512<10.3.2512.9
Splunk Splunk Cloud Platform=10.4.2603

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Splunk Enterprise to a version that resolves this vulnerability.

    Fixed in 10.2.2
  2. Upgrade

    Upgrade Splunk Enterprise to a version that resolves this vulnerability.

    Fixed in 10.0.5
  3. Upgrade

    Upgrade Splunk Enterprise to a version that resolves this vulnerability.

    Fixed in 9.4.11
  4. Upgrade

    Upgrade Splunk Enterprise to a version that resolves this vulnerability.

    Fixed in 9.3.12
  5. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 10.4.2603.1
  6. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 10.3.2512.9
  7. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 10.2.2510.11
  8. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 10.1.2507.21
  9. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 10.0.2503.13
  10. Upgrade

    Upgrade Splunk Cloud Platform to a version that resolves this vulnerability.

    Fixed in 9.3.2411.129

Event History

May 20, 2026
CVE Published
via MITRE·04:32 PM
Data Sourced
via MITRE·04:32 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-20240?

CVE-2026-20240 has been classified as a low-severity denial of service vulnerability.

2

How do I fix CVE-2026-20240?

To fix CVE-2026-20240, update Splunk Enterprise or Splunk Cloud Platform to the latest version beyond the specified vulnerable releases.

3

Which software versions are affected by CVE-2026-20240?

CVE-2026-20240 affects Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, as well as certain versions of Splunk Cloud Platform.

4

What exploits are associated with CVE-2026-20240?

CVE-2026-20240 could be exploited by a low-privileged user to execute denial of service attacks through the coldToFrozen.sh script.

5

Is CVE-2026-20240 present in Splunk Cloud Platform?

Yes, CVE-2026-20240 is present in multiple versions of Splunk Cloud Platform prior to 10.4.2603.1.

Company

Resources

Contact

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