CVE-2026-20266
CVE-2026-20266 is a critical-severity vulnerability in Splunk Ai Toolkit with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-37768
- Weakness: CWE-78
- Affected product: Splunk Ai Toolkit
- Published:
- Last modified:
Description
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.
Frequently asked questions
- 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.
- How severe is CVE-2026-20266?
- CVE-2026-20266 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-20266 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-20266?
- CVE-2026-20266 affects Splunk Ai Toolkit. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-20266?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-20266 have an EU (EUVD) identifier?
- Yes. CVE-2026-20266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37768.
- When was CVE-2026-20266 published?
- CVE-2026-20266 was published on 2026-06-17 and last updated on 2026-06-22.
References
Affected products (1)
- cpe:2.3:a:splunk:ai_toolkit:*:*:*:*:*:*:*:*
More vulnerabilities in Splunk Ai Toolkit
- CVE-2026-20238 — Medium (CVSS 6.5): In Splunk AI Toolkit versions below 5.7.3, a low-privileged user that does not hold the 'admin' or 'power' roles could…
- CVE-2026-20265 — Medium (CVSS 4.3): In Splunk AI Toolkit versions below 5.7.4, a low-privileged user that does not hold the "admin" or "power" Splunk roles…
All CVEs affecting Splunk Ai Toolkit →
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