What is CVE-2026-20266?
In Splunk AI Toolkit versions below 5.7.4, a user who holds the "admin" Splunk role could execute arbitrary OS commands on the host running the Splunk Enterprise instance. The vulnerability is possible because of an unsafe shell execution pattern in the btool configuration helper, which constructs OS command strings from dynamic parameters without disabling shell interpretation.
The record classifies CVE-2026-20266 under weakness class CWE-78. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 115 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.1 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 0.6% probability of exploitation in the next 30 days, higher than 48.7% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 6.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-06-17
Is CVE-2026-20266 being exploited?
It currently carries a trending score of 18 in the Threadlinqs vulnerability feed.
Affected products and versions
- Splunk: AI Toolkit
How to fix CVE-2026-20266
No vendor patch reference has been recorded for CVE-2026-20266 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-2026-20266
1 tracked threat in the Threadlinqs corpus references CVE-2026-20266, either in the campaign’s CVE list or as an indicator on the campaign record.
- Splunk AI Toolkit OS Command Injection in btool Configuration Helper (CVE-2026-20266) — CRITICAL · 2026-06-19
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .