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Vulnerability · Published Aug 10, 2026 · Assigned by redhat

CVE-2026-18948Feast: feast: unsafe dill deserialization of registry-stored udfs — rce on feature server and registry server

Critical 9.9

In plain English

A critical-severity unsafe deserialization in Red Hat OpenShift AI 2.25 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)1.1%top 34.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIfeast0.67.0GHSA-gg2p-37pv-v7fq

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat OpenShift AI 2.25 see references
Red Hat Red Hat OpenShift AI 3.3 see references
Red Hat Red Hat OpenShift AI 3.4 see references
Red Hat Red Hat OpenShift AI 3.4 see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references
Red Hat Red Hat OpenShift AI (RHOAI) see references

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References