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9.9
CVE-2026-18948: Feast: Malicious UDFs Can Execute Code Remotely
CVE-2026-18948 · published 24 days ago
Summary
Feast, a data management system, has a security flaw that allows a hacker to store malicious code on its servers. This code can then be executed remotely, potentially allowing the hacker to access sensitive data or move laterally within the system. To protect against this, users should update to the latest version of Feast and ensure that their UDFs are properly validated and authorized.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| red hat | red hat openshift ai (rhoai) | All versions |
| red hat | red hat openshift ai 3.3 | All versions |
Original advisory text
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 s...
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.
Severity
9.9
Critical
CVSS 3.1: 9.9 (NVD)
Exploitation
EPSS <1%
Type
CWE-502Deserialization of Untrusted Data
Timeline
Published10 Aug 2026
Updated3 Sep 2026
First seen10 Aug 2026
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