CVE-2026-18948

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.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:53261
https://access.redhat.com/errata/RHSA-2026:53262
https://access.redhat.com/errata/RHSA-2026:53263
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/security/cve/CVE-2026-18948
https://bugzilla.redhat.com/show_bug.cgi?id=2511167

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 21:17

Updated : 2026-08-27 17:17

NVD link : CVE-2026-18948

Mitre link : CVE-2026-18948

CVE.ORG link : CVE-2026-18948

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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