Deserialization in Red Hat Openshift Ai 2.25
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.011 · change: +0.004
Affected products
- Red Hat Openshift Ai 2.25 — versions 1786110051
- Red Hat Openshift Ai 3.3 — versions 1786110033
- Red Hat Openshift Ai 3.4 — versions 1786107278
- Red Hat Openshift Ai (Rhoai)
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-18948 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:53263 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53261 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53262 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:60520 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-18948?
- CVE-2026-18948 is a critical-severity vulnerability in Red Hat Openshift Ai 2.25, classified under Deserialization of Untrusted Data. CVSS score: 9.9/10. Published 2026-08-10.
- How severe is CVE-2026-18948?
- Critical severity. CVSS v3 base score is 9.9 out of 10.