What is CVE-2026-20203?

CVE-2026-20203 is a medium-severity vulnerability in Splunk Cloud Platform, 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.

Vulnerability in Splunk Cloud Platform

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…

EPSS: 0.000 (11.0th 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 Cloud Platform — versions 10.4.2603, 10.3.2512, 10.2.2510
Splunk Enterprise — versions 10.2, 10.0, 9.4

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

advisory.splunk.com/advisories/SVD-2026-0402

Frequently asked questions

What is CVE-2026-20203?: CVE-2026-20203 is a medium-severity vulnerability in Splunk Cloud Platform, 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.