---
id: CVE-2026-18948
title: A flaw was found in Feast
summary: >-
  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
  unauthe…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: Red Hat
product: rhoai/odh-feature-server-rhel9
affected:
  - rhoai/odh-feature-server-rhel9 (all versions)
  - rhoai/odh-feature-server-rhel9 (all versions)
  - rhoai/odh-feature-server-rhel9 (all versions)
  - rhoai/odh-feature-server-rhel9 (all versions)
  - rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9
  - rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9
  - rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9
  - rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9
  - rhoai/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9
  - rhoai/odh-pipeline-runtime-tensorflow-rocm-py312-rhel9
  - rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9
  - rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9
  - rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9
  - rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9
  - rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9
  - rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9
  - rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9
published: '2026-08-10'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T10:16:44.017'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18948'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:53261'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:53262'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:53263'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:60520'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-18948'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2511167'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-11T13:40:50.474434Z'
epss: 0.01079
epssPercentile: 0.63684
ingestedAt: '2026-09-28T10:07:17.785Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.