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CVE-2026-50645 Apache Software Foundation CVE debrief

CVE-2026-50645 is a HIGH severity vulnerability in Apache CXF, with a CVSS score of 7.5. The vulnerability occurs because there is no restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF, which can lead to uncontrolled resource consumption or a denial of service attack. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue by imposing a maximum default of 500 attachments per message.

Vendor
Apache Software Foundation
Product
Apache CXF
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-13
Advisory published
2026-06-12
Advisory updated
2026-06-13

Who should care

Users of Apache CXF, particularly those using versions prior to 4.2.2 or 4.1.7, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by the lack of restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF. This can lead to uncontrolled resource consumption or a denial of service attack. The vulnerability has been fixed in versions 4.2.2 and 4.1.7 of Apache CXF.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Apache CXF version 4.2.2 or 4.1.7, or later.

Evidence notes

The CVE-2026-50645 vulnerability was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-50645) and has a detailed description on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-50645).

Official resources

CVE-2026-50645 was published on 2026-06-12T10:16:23.533Z and modified on 2026-06-13T01:00:40.040Z.