Description
Apache CXF allows to set a limit on the number of form parameters in a JAX-RS message via the "maxFormParameterCount" configuration option. However, no default limit is set which may lead to denial of service attacks when processing requests with very large numbers of form parameters. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue by using a default limit of 500 parameters.
Affected products
apache: cxf
References2
- lists.apache.org/thread/2n14mk01bjc3lrsyhzrkwy8h86289mov Mailing ListVendor Advisory
- www.openwall.com/lists/oss-security/2026/08/06/15
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 55 · as of 12 November 2026
- CWE
- CWE-400
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