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

> CVE-2026-20251: Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway. CVSS 8.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-20251
Last updated: 2026-06-17T10:17:19Z

- Published: 2026-06-10 17:16 UTC · Updated: 2026-06-17 10:17 UTC · Assigner: cisco
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 32.2%, 98th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-502

## 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 vendors and products

- Splunk: Splunk Cloud Platform
- Splunk: Splunk Enterprise
- Splunk: Splunk Secure Gateway

## Tracked companies

- [Splunk](https://rewindex.com/company/splunk.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20251)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-20251)
- [https://advisory.splunk.com/advisories/SVD-2026-0601](https://advisory.splunk.com/advisories/SVD-2026-0601)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-20251 · Markdown: https://rewindex.com/cve/CVE-2026-20251.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-20251 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:02.821Z