Is CVE-2026-18947 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18947?

CVE-2026-18947 has a CVSS v3 severity of HIGH (8.5).

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CVE-2026-18947

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.