What is CVE-2026-18948?

CVE-2026-18948 is a critical-severity vulnerability in Red Hat Openshift Ai 3.3, 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.

Deserialization in Red Hat Openshift Ai 3.3

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 unauthent…

Vulnerability class: Insecure Deserialization

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.

Affected products

Red Hat Openshift Ai 3.3 — versions 1786110033
Red Hat Openshift Ai (Rhoai)

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)

Frequently asked questions

What is CVE-2026-18948?: CVE-2026-18948 is a critical-severity vulnerability in Red Hat Openshift Ai 3.3, 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.