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Fencer Vulns
high 7.5

CVE-2026-102496 json

Apache XMLSchema: Denial of service through deeply nested schema structures

published 2026-09-29 40 d ago modified 2026-10-06 33 d ago also EUVD-2026-88738

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 44%
public exploits
0
none known

Summary

Apache XmlSchema doesn't limit how deeply schema structures can be nested when it builds its schema model, so a malicious schema can make parsing recurse until the stack overflows. This causes a denial of service. Users are recommended to upgrade to version 2.3.3, which fixes this issue.

Patch / fix

  • Apache Software Foundation Apache XMLSchema 2.3.3

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-2026-102496 updated cvss 7.5

org.apache.ws.xmlschema/xmlschema-core: Apache XMLSchema: Denial of Service (DoS) via deeply nested schema structures

  • Red Hat build of Apache Camel 4 for Quarkus 3 xmlschema-core 2.3.2.redhat-00001 Red Hat build of Apache Camel for Spring Boot 4 xmlschema-core 2.3.2.redhat-00001
    affected: workaround, no fix available
  • Red Hat JBoss Enterprise Application Platform 7 xmlschema-core 2.3.2.redhat-00001, 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 “Will not fix”
  • Red Hat JBoss Enterprise Application Platform 8 xmlschema-core 2.3.2.redhat-00001 Red Hat OpenShift AI (RHOAI) rhoai/odh-spark-operator-rhel9
    affected: workaround, no fix available
  • Red Hat Single Sign-On 7 xmlschema-core 2.3.2.redhat-00001
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Build of Apache Camel 3.33.4.redhat xmlschema-core 2.3.3.redhat-00001
    fixed: vendor fix RHSA-2026:83670
  • Red Hat Build of Apache Camel 3.33.4.redhat 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 xmlschema-core 2.3.2.redhat-00001
    not affected: vulnerable code not in execute path
  • Red Hat JBoss Enterprise Application Platform Expansion Pack xmlschema-core 2.3.2.redhat-00001
    not affected: component not present
show 1 more
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-th-torch-cpu-py312-rhel9, rhoai/odh-th-torch-cuda-py312-rhel9, rhoai/odh-th06-cpu-torch210-py312-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-rocm64-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch210-py312-rhel9, +1 more
    not affected: vulnerable code not in execute path

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
40 d ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 XMLSchema

Classification

Weakness

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.

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