CVE-2026-20251
Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
At a glance
- Source
- NVD
- EPSS
- EPSS 32.21 % · percentile 98 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-502 — Deserialization of Untrusted Data
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-36082
- GCVE · GCVE-0-2026-20251
CERT-FR advisories
- CERTFR-2026-AVI-0736 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 9.3.0 < 9.3.13cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 9.4.0 < 9.4.12cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 10.0.0 < 10.0.7cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 10.2.0 < 10.2.4cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 9.3.2411 < 9.3.2411.132cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.1.2507 < 10.1.2507.22cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.2.2510 < 10.2.2510.14cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.3.2512 < 10.3.2512.12cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*≥ 3.8.0 < 3.8.67cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*≥ 3.9.0 < 3.9.20cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*≥ 3.10.0 < 3.10.6
Affected products
| Product | Versions |
|---|---|
| Splunk · Splunk Enterprise | affected 10.2 < 10.2.4 ; affected 10.0 < 10.0.7 ; affected 9.4 < 9.4.12 ; affected 9.3 < 9.3.13 |
| Splunk · Splunk Cloud Platform | affected 10.3.2512 < 10.3.2512.12 ; affected 10.2.2510 < 10.2.2510.14 ; affected 10.1.2507 < 10.1.2507.22 ; affected 9.3.2411 < 9.3.2411.132 |
| Splunk · Splunk Secure Gateway | affected 3.10 < 3.10.6 ; affected 3.9 < 3.9.20 ; affected 3.8 < 3.8.67 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |