Deserialization of Untrusted Data Affecting eap7-wildfly-java-jdk8 package, versions <0:7.4.26-5.GA_redhat_00002.1.el9eap


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.15% (66th percentile)

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  • Snyk IDSNYK-RHEL9-EAP7WILDFLYJAVAJDK8-22499805
  • published12 Nov 2026
  • disclosed6 Aug 2026

Introduced: 6 Aug 2026

CVE-2026-66909  (opens in a new tab)
CWE-502  (opens in a new tab)

How to fix?

Upgrade RHEL:9 eap7-wildfly-java-jdk8 to version 0:7.4.26-5.GA_redhat_00002.1.el9eap or higher.
This issue was patched in RHSA-2026:99099.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eap7-wildfly-java-jdk8 package and not the eap7-wildfly-java-jdk8 package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS Base Scores

version 3.1