Vulnerability in Splunk
CVE-2026-20203
In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles, has write permission on the app, and does not hold the high-privilege capability `accelerate_datamodel`, could turn on or off Data Model Acceleration due to improper access control.
EPSS: 0.002 (4.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Splunk
- Splunk Cloud Platform — versions 10.4.2603, 10.3.2512, 10.2.2510
- Splunk Splunk_cloud_platform
- Splunk Enterprise — versions 10.2, 10.0, 9.4
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20203?
- CVE-2026-20203 is a medium-severity vulnerability in Splunk, classified under Improper Access Control. CVSS score: 4.3/10. Published 2026-04-15.
- How severe is CVE-2026-20203?
- Medium severity. CVSS v3 base score is 4.3 out of 10.