CVE-2026-20251 (GCVE-0-2026-20251)

Vulnerability from cvelistv5 – Published: 2026-06-10 17:16 – Updated: 2026-06-11 03:55
VLAI
Title
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
Assigner
References
Impacted products
Vendor Product Version
Splunk Splunk Enterprise Affected: 10.2 , < 10.2.4 (custom)
Affected: 10.0 , < 10.0.7 (custom)
Affected: 9.4 , < 9.4.12 (custom)
Affected: 9.3 , < 9.3.13 (custom)
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Splunk Splunk Cloud Platform Affected: 10.3.2512 , < 10.3.2512.12 (custom)
Affected: 10.2.2510 , < 10.2.2510.14 (custom)
Affected: 10.1.2507 , < 10.1.2507.22 (custom)
Affected: 9.3.2411 , < 9.3.2411.132 (custom)
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Splunk Splunk Secure Gateway Affected: 3.10 , < 3.10.6 (custom)
Affected: 3.9 , < 3.9.20 (custom)
Affected: 3.8 , < 3.8.67 (custom)
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Date Public
2026-06-10 00:00
Credits
M Mahdan Argya Syarif (0xbeludan)
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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