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Fencer Vulns
critical 9.1

CVE-2021-23926 json

XMLBeans XML Entity Expansion

published 2021-01-14 5 y ago modified 2026-06-17 4 mo ago also GHSA-mw3r-pfmg-xp92 , EUVD-2021-1365

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.3%
EPSS 6.3% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from malicious XML input. Vulnerabilities include possibilities for XML Entity Expansion attacks. Affects XMLBeans up to and including v2.6.0.

Patch / fix

  • maven org.apache.xmlbeans:xmlbeans 3.0.0
  • xmlbeans Debian 14, Debian 13, Debian 12 3.0.2-1

debian advisories DEBIAN-CVE-2021-23926

  • xmlbeans SLE Workstation Extension 12 SP5, SLE Software Development Kit 12 SP5 2.6.0-3.3.1
  • xmlbeans SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +10 more 2.6.0-150000.5.3.1

suse advisories SUSE-SU-2022:3876-1SUSE-SU-2022:3875-1

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-2021-23926 updated cvss 7.4

xmlbeans: allowed malicious XML input may lead to XML Entity Expansion attack

  • Red Hat BPM Suite 6 xmlbeans xmlbeans Red Hat JBoss BRMS 6 xmlbeans xmlbeans Red Hat JBoss Data Virtualization 6 xmlbeans xmlbeans
    affected: workaround, no fix planned “Affected users are advised to update to Apache XMLBeans 3.0.0 or above, which fixes this vulnerability.”
  • Red Hat JBoss Fuse 6 xmlbeans xmlbeans
    affected: workaround, no fix available “Affected users are advised to update to Apache XMLBeans 3.0.0 or above, which fixes this vulnerability.”
  • Red Hat JBoss Fuse Service Works 6 xmlbeans xmlbeans Red Hat JBoss SOA Platform 5 xmlbeans xmlbeans
    affected: workaround, no fix planned “Affected users are advised to update to Apache XMLBeans 3.0.0 or above, which fixes this vulnerability.”
  • Red Hat Fuse 7.10
    fixed: vendor fix “Affected users are advised to update to Apache XMLBeans 3.0.0 or above, which fixes this vulnerability.” RHSA-2021:5134
  • Red Hat Decision Manager 7 xmlbeans xmlbeans Red Hat Integration Camel K 1 xmlbeans xmlbeans Red Hat JBoss Enterprise Application Platform 7 xmlbeans xmlbeans Red Hat Process Automation 7 xmlbeans xmlbeans
    not affected: vulnerable code 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

Exploit prediction

6.29% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.xmlbeans:xmlbeans
<3.0.0
3.0.0

Affected products

  • Apache Software Foundation Apache XMLBeans

Classification

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

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.