Is CVE-2026-18948 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18948?

CVE-2026-18948 has a CVSS v3 severity of CRITICAL (9.9).

Back

CVE-2026-18948

Description

A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in default configurations. An authenticated attacker can also achieve arbitrary code execution on the registry server by bypassing authorization checks during deserialization. This vulnerability can result in cross-tenant data access and lateral movement within the system.