CVE-2026-20240— Denial of Service through coldToFrozen.sh Script in Splunk Enterprise
Possible ATT&CK Techniques 2AI
T1484 · Domain or Tenant Policy Modification T1499 · Endpoint Denial of ServiceAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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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
- CVE-2026-20239
Sensitive Information Disclosure through Log Files in Splunk - CVE-2026-20203
Improper Access Control in Data Model Acceleration in Splunk - CVE-2026-20204
Improper Handling and Insufficient Isolation of Specific Tem - CVE-2026-20202
Improper Input Validation during User Account Creation in Sp - CVE-2026-20163
Remote Command Execution (RCE) through the '/splunkd/__uploa
Same vendor: Splunk
- CVE-2026-20238
Improper Access Control through Role Inheritance in Splunk A - CVE-2026-20239
Sensitive Information Disclosure through Log Files in Splunk - CVE-2026-20205
Sensitive Information Disclosure in ''_internal'' index in S - CVE-2026-20203
Improper Access Control in Data Model Acceleration in Splunk - CVE-2026-20204
Improper Handling and Insufficient Isolation of Specific Tem
Same weakness: CWE-20
- CVE-2026-26147
Azure Stack HCI Information Disclosure Vulnerability - CVE-2026-40411
Azure Virtual Network Gateway Remote Code Execution Vulnerab - CVE-2026-3294
Authentication Logic Vulnerability on Multiple TP-Link Range - CVE-2026-34207
TypeBot: SSRF Protection Bypass via DNS-Resolved Hostnames i - CVE-2026-44417
Apache CXF: Incomplete fix for CVE-2025-48913 (Untrusted JMS
V. Comments for CVE-2026-20240
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