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Fencer Intel
high 7.5

CVE-2026-108039 json

Apache CXF: Prevent unbounded XML document size in StaxUtils by adding default element and character limits

published last mo. modified 24d ago also EUVD-2026-95704

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

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.

Patch / fix

  • Apache Software Foundation Apache CXF 3.6.13, 4.1.9, 4.2.4

Is CVE-2026-108039 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-108039 updated cvss 7.5

org.apache.cxf/cxf-core: Apache CXF: Denial of Service via unrestricted XML parsing

  • Red Hat build of Apache Camel 4 for Quarkus 3 cxf-core 4.1.7.rhbac-redhat-00003 Red Hat build of Apache Camel for Spring Boot 4 cxf-core 4.1.7.rhbac-redhat-00003
    affected: workaround, no fix available
  • Red Hat JBoss Enterprise Application Platform 7 cxf-core 4.1.7.rhbac-redhat-00003, jboss-eap-7/eap74-els-openjdk8-openshift-rhel8, jboss-eap-7/eap74-els-openjdk11-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform 8 cxf-core 4.1.7.rhbac-redhat-00003
    affected: workaround, no fix available
  • Red Hat JBoss Web Server 5 cxf-core 4.1.7.rhbac-redhat-00003
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Single Sign-On 7 cxf-core 4.1.7.rhbac-redhat-00003
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Build of Apache Camel 3.33.4.SP3 cxf-core 4.1.9.rhbac-redhat-00001
    fixed: vendor fix RHSA-2026:95622
  • Red Hat Build of Apache Camel 3.33.4.SP3 jimfs 1.1, jna 5.8.0, bcel 6.7.0, gax 2.74.1, icu4j 78.2, joni 2.2.6, +1616 more
    not affected: vulnerable code not present
  • Red Hat Fuse 7 cxf-core 4.1.7.rhbac-redhat-00003
    not affected: vulnerable code not in execute path
show 1 more
  • Red Hat JBoss Enterprise Application Platform Expansion Pack cxf-core 4.1.7.rhbac-redhat-00003
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
25d ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Apache Software Foundation Apache CXF

Classification

Weakness
  • CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

Sources

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CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.