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CVE-2026-20251— Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway

Quick assessment

Affected
Splunk Splunk Enterprise
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Splunk等都是美国Splunk公司的产品。Splunk是一套数据收集分析软件。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多款产品存在代码问题漏洞，该漏洞源于通过jsonpickle Python库对App Key Value Store数据进行不安全反序列化，可能导致低权限用户进行远程代码执行。以下产品及版本受到影响：Splunk Enterprise 10.2.4之前版本、10.0.7之前版

CVSS 8.8 · High EPSS 32.21% · P98

Affected Version Matrix 11

VendorProduct Version RangeStatus
Splunk Splunk Cloud Platform 10.3.2512< 10.3.2512.12 affected
10.2.2510< 10.2.2510.14 affected
10.1.2507< 10.1.2507.22 affected
9.3.2411< 9.3.2411.132 affected
Splunk Splunk Enterprise 10.2< 10.2.4 affected
10.0< 10.0.7 affected
9.4< 9.4.12 affected
9.3< 9.3.13 affected
Splunk Splunk Secure Gateway 3.10< 3.10.6 affected
3.9< 3.9.20 affected
3.8< 3.8.67 affected
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I. Basic Information for CVE-2026-20251

Vulnerability Information
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Vulnerability Title
Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, Splunk Cloud Platform versions below 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, and Splunk Secure Gateway versions below 3.10.6, 3.9.20, and 3.8.67, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could perform a Remote Code Execution (RCE) through the Splunk Secure Gateway app.<br><br>The Remote Code Execution is possible because of unsafe deserialization of App Key Value Store (KV Store) data through the ‘jsonpickle’ Python library, which reconstructs arbitrary Python objects from specially crafted JavaScript Object Notation (JSON) without adequate validation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk多款产品 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk等都是美国Splunk公司的产品。Splunk是一套数据收集分析软件。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多款产品存在代码问题漏洞，该漏洞源于通过jsonpickle Python库对App Key Value Store数据进行不安全反序列化，可能导致低权限用户进行远程代码执行。以下产品及版本受到影响：Splunk Enterprise 10.2.4之前版本、10.0.7之前版
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 ~ 10.2.4 -
Splunk Splunk Cloud Platform 10.3.2512 ~ 10.3.2512.12 -
Splunk Splunk Secure Gateway 3.10 ~ 3.10.6 -

II. Public POCs for CVE-2026-20251

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III. Intelligence Information for CVE-2026-20251

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Vendor Advisories for CVE-2026-20251 (1)

Same Patch Batch · Splunk · 2026-06-10 · 10 CVEs total

CVE-2026-20253 9.8 CRITICAL Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service End
CVE-2026-20252 7.6 HIGH Server-Side Request Forgery (SSRF) through Dashboard Studio PDF Export in Splunk Enterpris
CVE-2026-20258 7.1 HIGH Stored Cross-Site Scripting (XSS) through Classic Dashboard in Splunk Enterprise
CVE-2026-20254 5.7 MEDIUM Information Disclosure through External Content Restriction Bypass in Splunk Enterprise
CVE-2026-20257 5.7 MEDIUM Improper Input Validation through Classic Dashboard CSS in Splunk Enterprise
CVE-2026-20255 5.7 MEDIUM Improper Input Validation through Classic Dashboards in Splunk Enterprise
CVE-2026-20256 5.7 MEDIUM Improper Input Validation through Protocol-Relative URL in Classic Dashboards in Splunk En
CVE-2026-20259 5.5 MEDIUM Improper Access Control in Splunk Enterprise
CVE-2026-20260 4.3 MEDIUM Log Injection through HTTP Request Paths in Splunk SOAR

IV. Related Vulnerabilities

Same product: Splunk Enterprise
Same vendor: Splunk
Same weakness: CWE-502

V. Comments for CVE-2026-20251

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