CVE-2026-66909

critical · 9.8

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.

9.8

CVSS

0.7%

EPSS (exploit prob.)

50th

EPSS percentile

2026-08-06

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-502

Affected products

Vendor	Product	Affected versions
apache	cxf	< 3.6.12
apache	cxf	>= 4.0.0, < 4.1.8
apache	cxf	>= 4.2.0, < 4.2.3

Check a specific version with /api/v1/cve/match.

References

https://lists.apache.org/thread/lr5d4tg6tf7j29jmw8wt242oowonjqpx
http://www.openwall.com/lists/oss-security/2026/08/06/18

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-66909