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VulnerabilityCVE-2026-20251Published 2026-06-10

CVE-2026-20251 — Splunk Enterprise

highPublic exploit1 PoC repo

As of 2026-06-11, CVE-2026-20251 is a HIGH-severity vulnerability in Splunk Enterprise, CVSS v3.1 8.8, EPSS 32.2% (98.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20251, most recently “CVE-2026-20251: Splunk Secure Gateway jsonpickle Deserialization RCE with Public PoC”.

CVSS v3.1
8.8/10High
EPSS
32.2%Higher than 98.2% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
10/10Threadlinqs triage score
Published
Updated 2026-06-11
CVSS v3.1 8.8 (HIGH) · EPSS 32.2% (higher than 98.2% of all scored CVEs) · Priority 10/10 · Published 2026-06-10

Last updated:

What is CVE-2026-20251?

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.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.

The record classifies CVE-2026-20251 under weakness class CWE-502. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 122 days ago.

Severity and exploitation probability

CVSS v3.1 base score
8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
32.2% probability of exploitation in the next 30 days, higher than 98.2% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-06-10, last modified 2026-06-11

Is CVE-2026-20251 being exploited?

Weaponised exploit code for CVE-2026-20251 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

Affected products and versions

  • Splunk: Enterprise, Cloud Platform, Secure Gateway

How to fix CVE-2026-20251

No vendor patch reference has been recorded for CVE-2026-20251 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-20251

1 tracked threat in the Threadlinqs corpus references CVE-2026-20251, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .

Other references