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

Summary

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.

Timeline

1. Jun 10, 2026, 12:00 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

2. Jun 10, 2026, 5:16 PM UTCCVE published
3. Jun 11, 2026, 3:55 AM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Splunk Splunk Enterprise

  From 10.2 · fixed in 10.2.4; From 10.0 · fixed in 10.0.7; From 9.4 · fixed in 9.4.12; From 9.3 · fixed in 9.3.13

• Splunk Splunk Cloud Platform

  From 10.3.2512 · fixed in 10.3.2512.12; From 10.2.2510 · fixed in 10.2.2510.14; From 10.1.2507 · fixed in 10.1.2507.22; From 9.3.2411 · fixed in 9.3.2411.132

• Splunk Splunk Secure Gateway

  From 3.10 · fixed in 3.10.6; From 3.9 · fixed in 3.9.20; From 3.8 · fixed in 3.8.67

References 2