VULNERABILITY INTELLIGENCE
CVE-2026-86404
CVSS score8.8 HIGH
EPSS probability0.70%
CISA KEVNot currently listed
Published2026-09-07
Last modified2026-11-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are empty. When the allow-list is empty (size == 0), isTrustedType() returns true for ALL classes. This means all classes are deserializable by default.
Weakness classification
- secalert@redhat.com: CWE-502