Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Cxf | < 3.6.12 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/lr5d4tg6tf7j29jmw8wt242oowonjqpxMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/08/06/18
FAQ
What is CVE-2026-66909?
CVE-2026-66909 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ser...
How severe is CVE-2026-66909?
CVE-2026-66909 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-66909?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Cxf.