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CVE-2026-20203: Improper Access Control in Data Model Acceleration in Splunk Enterprise

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-15 · updated 2026-10-26
• Weakness: CWE-284

Description

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.

Affected products

• Splunk Enterprise: from 9.3.0 before 9.3.11; from 9.4.0 before 9.4.10; from 10.0.0 before 10.0.5; from 10.2.0 before 10.2.2 — fixed in 9.3.11, 9.4.10, 10.0.5, 10.2.2
• Splunk Cloud Platform: from 9.3.2411 before 9.3.2411.127; from 10.0.2503 before 10.0.2503.13; from 10.1.2507 before 10.1.2507.19; from 10.2.2510 before 10.2.2510.10; from 10.3.2512 before 10.3.2512.6 — fixed in 9.3.2411.127, 10.0.2503.13, 10.1.2507.19, 10.2.2510.10, 10.3.2512.6

How to fix

Upgrade to a fixed version: Splunk Enterprise 9.3.11, 9.4.10, 10.0.5, 10.2.2; Splunk Cloud Platform 9.3.2411.127, 10.0.2503.13, 10.1.2507.19, 10.2.2510.10. Check the vendor advisory for mitigations.

References

• https://advisory.splunk.com/advisories/SVD-2026-0402

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