CVE-2026-20251

Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway

Published Jun 10, 2026 CVSS 3.1 · 8.8 High EPSS 30.6% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Splunk

Splunk Enterprise

affected

Version	Status	Constraints
`10.2`	affected	< 10.2.4
`10.0`	affected	< 10.0.7
`9.4`	affected	< 9.4.12
`9.3`	affected	< 9.3.13

Splunk

Splunk Cloud Platform

affected

Version	Status	Constraints
`10.3.2512`	affected	< 10.3.2512.12
`10.2.2510`	affected	< 10.2.2510.14
`10.1.2507`	affected	< 10.1.2507.22
`9.3.2411`	affected	< 9.3.2411.132

Splunk

Splunk Secure Gateway

affected

Version	Status	Constraints
`3.10`	affected	< 3.10.6
`3.9`	affected	< 3.9.20
`3.8`	affected	< 3.8.67

Configuration 1 [-]

OR	cpe:2.3:a:splunk:splunk:::::enterprise:::*
	cpe:2.3:a:splunk:splunk:::::enterprise:::*
	cpe:2.3:a:splunk:splunk:::::enterprise:::*
	cpe:2.3:a:splunk:splunk:::::enterprise:::*

Configuration 2 [-]

OR	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::

Configuration 3 [-]

OR	cpe:2.3:a:splunk:splunk_secure_gateway::::::::
	cpe:2.3:a:splunk:splunk_secure_gateway::::::::
	cpe:2.3:a:splunk:splunk_secure_gateway::::::::

No data.

Vendor Product Versions

Splunk

Splunk Cloud Platform

Version	Status	Scheme	Platform
`[10.3.2512,10.3.2512.12)`	affected	generic	—
`[10.2.2510,10.2.2510.14)`	affected	generic	—
`[10.1.2507,10.1.2507.22)`	affected	generic	—
`[9.3.2411,9.3.2411.132)`	affected	generic	—

Splunk

Splunk Enterprise

Version	Status	Scheme	Platform
`[10.2,10.2.4)`	affected	generic	—
`[10.0,10.0.7)`	affected	generic	—
`[9.4,9.4.12)`	affected	generic	—
`[9.3,9.3.13)`	affected	generic	—

Splunk

Splunk Secure Gateway

Version	Status	Scheme	Platform
`[3.10,3.10.6)`	affected	generic	—
`[3.9,3.9.20)`	affected	generic	—
`[3.8,3.8.67)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 30.6% (30.645% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://advisory.splunk.com/advisories/SVD-2026-0601

History

Jun 15, 2026 5:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Splunk splunk
CPEs		cpe:2.3:a:splunk:splunk:::::enterprise:::* cpe:2.3:a:splunk:splunk_cloud_platform:::::::: cpe:2.3:a:splunk:splunk_secure_gateway::::::::
Vendors & Products		Splunk splunk

Jun 10, 2026 7:45 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Splunk Splunk splunk Cloud Platform Splunk splunk Enterprise Splunk splunk Secure Gateway
Vendors & Products		Splunk Splunk splunk Cloud Platform Splunk splunk Enterprise Splunk splunk Secure Gateway

Jun 10, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Jun 10, 2026 6:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
Weaknesses		CWE-502
References		https://advisory.splunk.com/advisories/SVD-2026-0601
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`