Apache CXF: Prevent unbounded XML document size in StaxUtils by adding default element and character limits
By default, StaxUtils placed no limit on the total number of elements or the total number of characters in an XML document. A very large request could therefore use a lot of memory and CPU during parsing, especially where CXF builds a DOM from the input (for example SAAJ or WS-Security), and could cause a denial of service when no request size limit was configured. Both limits now have defaults: the maximum element count is 100 × maxChildElements (5,000,000 by default), and the maximum document size is 256M characters. Applications that process larger documents can raise the limits with the org.apache.cxf.stax.maxElementCount and org.apache.cxf.stax.maxXMLCharacters properties. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
CVE-2026-108039
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-108039
Apache CXF
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Apache Software Foundation",
"product": "Apache CXF",
"versions": [
{
"status": "affected",
"version": "4.2.0",
"lessThan": "4.2.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.0.0",
"lessThan": "4.1.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "0",
"lessThan": "3.6.13",
"versionType": "semver"
}
],
"packageURL": "pkg:maven/org.apache.cxf/cxf-core",
"packageName": "org.apache.cxf:cxf-core",
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-108039
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #29938 · Revision 1
- Added to Heist Feed
- Publisher date