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

Quick assessment

Affected
Splunk Splunk Enterprise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Splunk Cloud Platform和Splunk Enterprise都是美国Splunk公司的产品。Splunk Cloud Platform是一个强大的数据收集、处理和分析服务。Splunk Enterprise是一套数据收集分析软件。 Splunk Cloud Platform和Splunk Enterprise存在输入验证错误漏洞，该漏洞源于coldToFrozen.sh脚本中缺少输入验证，可能导致低权限用户重命名关键Splunk目录并造成拒绝服务。以下产品及版本受到影响：Splunk E

CVSS 7.1 · Medium EPSS 0.40% · P32

Affected Version Matrix 10

VendorProduct Version RangeStatus
Splunk Splunk Cloud Platform 10.4.2603< 10.4.2603.1 affected
10.3.2512< 10.3.2512.9 affected
10.2.2510< 10.2.2510.11 affected
10.1.2507< 10.1.2507.21 affected
10.0.2503< 10.0.2503.13 affected
9.3.2411< 9.3.2411.129 affected
Splunk Splunk Enterprise 10.2< 10.2.2 affected
10.0< 10.0.5 affected
9.4< 9.4.11 affected
9.3< 9.3.12 affected
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I. Basic Information for CVE-2026-20240

Vulnerability Information
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Vulnerability Title
Denial of Service through coldToFrozen.sh Script in Splunk Enterprise
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk Cloud Platform和Splunk Enterprise 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk Cloud Platform和Splunk Enterprise都是美国Splunk公司的产品。Splunk Cloud Platform是一个强大的数据收集、处理和分析服务。Splunk Enterprise是一套数据收集分析软件。 Splunk Cloud Platform和Splunk Enterprise存在输入验证错误漏洞，该漏洞源于coldToFrozen.sh脚本中缺少输入验证，可能导致低权限用户重命名关键Splunk目录并造成拒绝服务。以下产品及版本受到影响：Splunk E
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk Enterprise 10.2 ~ 10.2.2 -
Splunk Splunk Cloud Platform 10.4.2603 ~ 10.4.2603.1 -

II. Public POCs for CVE-2026-20240

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III. Intelligence Information for CVE-2026-20240

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Vendor Advisories for CVE-2026-20240 (1)

Same Patch Batch · Splunk · 2026-05-20 · 3 CVEs total

CVE-2026-20239 7.5 HIGH Sensitive Information Disclosure through Log Files in Splunk Enterprise
CVE-2026-20238 6.5 MEDIUM Improper Access Control through Role Inheritance in Splunk AI Toolkit app

IV. Related Vulnerabilities

Same product: Splunk Enterprise
Same vendor: Splunk
Same weakness: CWE-20

V. Comments for CVE-2026-20240

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