Resource exhaustion in Apache Cxf
CVE-2026-50645
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 or 3.6.12, which fix this issue by imposing a maximum default of 500 attachments per message.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.003
Affected products
- Apache Cxf
- Apache Software Foundation Cxf — versions 4.0.0, 0, 4.2.0
Weakness classification (CWE)
References
- lists.apache.org/thread/24zb7cqcvykhwm0j797dmdq25s61mj93 (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-50645?
- CVE-2026-50645 is a high-severity vulnerability in Apache Cxf, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-12.
- How severe is CVE-2026-50645?
- High severity. CVSS v3 base score is 7.5 out of 10.