Splunk Enterprise and Cloud Platform
CVE-2026-20251: Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Splunk Enterprise 10.2 | 10.2.4 or later |
| Splunk Enterprise 10.0 | 10.0.7 or later |
| Splunk Enterprise 9.4 | 9.4.12 or later |
| Splunk Enterprise 9.3 | 9.3.13 or later |
| Splunk Cloud Platform 10.3 | 10.3.2512.12 or later |
| Splunk Cloud Platform 10.2 | 10.2.2510.14 or later |
| Splunk Cloud Platform 10.1 | 10.1.2507.22 or later |
| Splunk Cloud Platform 9.3 | 9.3.2411.132 or later |
| Splunk Secure Gateway 3.10 | 3.10.6 or later |
| Splunk Secure Gateway 3.9 | 3.9.20 or later |
| Splunk Secure Gateway 3.8 | 3.8.67 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.