CVE-2026-20251: high-severity vulnerability in Splunk Secure Gateway
Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
Published · Updated
53Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 32%
from disclosure to weapon16 days
Published on NVDJun 10
1st PoC+16d
exploitation probability
32%top 2% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Splunk · Splunk Cloud PlatformSplunk · Splunk EnterpriseSplunk · Splunk Secure Gatewaypublic PoCs found — 1
githubgithub.com/reactivezero/CVE-2026-20251★ 3⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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