CVE-2026-18947 Feast: feast: authorization bypass in /materialize endpoints enables dos via unauthorized full re-materialization
An attacker can bypass authorization checks to trigger full re-materialization, causing denial of service via resource exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18947?
CVE-2026-18947 is a high-severity missing authorization vulnerability in Red Hat OpenShift AI (RHOAI), published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in Feast. An authorization bypass vulnerability exists in the /materialize and /materialize-incremental endpoints. By sending a specially crafted request that omits the feature_views field, an attacker can bypass intended permission checks. This allows an unauthenticated remote attacker, or any authenticated user, to trigger a full re-materialization of all feature views. The consequence is a Denial of Service (DoS) due to data corruption and significant resource consumption across all tenants.
Weakness: CWE-862
Which versions are affected by CVE-2026-18947?
How do I fix CVE-2026-18947?
No fix has been published for CVE-2026-18947 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-2026-18947 being exploited?
There is no known exploitation of CVE-2026-18947 in the wild and no public exploit code.
Sources
Also known as GHSA-mvxh-8c54-7fwx.