CVE-2026-66909

CRITICAL

Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0069
EPSS Percentile 49.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-502
Status published
Products (4)
apache/cxf < 3.6.12
Apache Software Foundation/Apache CXF < 3.6.12
Apache Software Foundation/Apache CXF 4.0.0 - 4.1.8
Apache Software Foundation/Apache CXF 4.2.0 - 4.2.3
Published Aug 06, 2026
Tracked Since Aug 06, 2026