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

What is CVE-2026-20203?

CVE-2026-20203 is a medium-severity missing authorization vulnerability in Splunk Splunk, published on 15 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-284

Which versions are affected by CVE-2026-20203?

It affects 2 products.

Products include Splunk Splunk, Splunk Splunk Cloud Platform.

How do I fix CVE-2026-20203?

No fix has been published for CVE-2026-20203 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-20203 being exploited?

There is no known exploitation of CVE-2026-20203 in the wild and no public exploit code.

Other vulnerabilities in Splunk Splunk

• CVE-2026-20253 Splunk Enterprise Missing Authentication for Critical Function Exploited Critical 9.8
• CVE-2026-76268 Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise Critical 9.8
• CVE-2026-76284 Improper Neutralization in Splunk Enterprise Critical 9.8
• CVE-2026-76285 Improper Adherence to Coding Standards in Splunk Enterprise Critical 9.8
• CVE-2017-17067 Auth bypass in n/a Critical 9.8

All Splunk Splunk vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gpm4-vrgj-h7qc.