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

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Summary

CVECVE-2026-20251
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 18:16:40 UTC
Updated2026-06-10 18:16:40 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.003660000 probability, percentile 0.591080000 (date 2026-06-13)

Problem Types: CWE-502 | CWE-502 The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Splunk Splunk Enterprise affected 10.2 10.2.4 custom Not specified
CNA Splunk Splunk Enterprise affected 10.0 10.0.7 custom Not specified
CNA Splunk Splunk Enterprise affected 9.4 9.4.12 custom Not specified
CNA Splunk Splunk Enterprise affected 9.3 9.3.13 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.3.2512 10.3.2512.12 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.2.2510 10.2.2510.14 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.1.2507 10.1.2507.22 custom Not specified
CNA Splunk Splunk Cloud Platform affected 9.3.2411 9.3.2411.132 custom Not specified
CNA Splunk Splunk Secure Gateway affected 3.10 3.10.6 custom Not specified
CNA Splunk Splunk Secure Gateway affected 3.9 3.9.20 custom Not specified
CNA Splunk Splunk Secure Gateway affected 3.8 3.8.67 custom Not specified

References

ReferenceSourceLinkTags
advisory.splunk.com/advisories/SVD-2026-0601 [email protected] advisory.splunk.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: M Mahdan Argya Syarif (0xbeludan) (en)

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