---
title: "CVE-2026-102497: Apache XmlSchema - Denial of Service"
description: "Apache XmlSchema walker contains a denial of service caused by lack of cycle detection in type derivation, substitution groups, model groups, or attribute groups, letting attackers cause stack overflow via malicious schema, exploit requires crafted malicious schema."
url: https://panop.io/threat-heartbeat/CVE-2026-102497/
---

# CVE-2026-102497 Apache XmlSchema - Denial of Service

Apache XmlSchema walker contains a denial of service caused by lack of cycle detection in type derivation, substitution groups, model groups, or attribute groups, letting attackers cause stack overflow via malicious schema, exploit requires crafted malicious schema.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.53% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102497)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

29 September 2026

Updated

15 October 2026

Weakness

[CWE-674](https://cwe.mitre.org/data/definitions/674.html)

## Vendor fix

Upgrade to version 2.3.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102497](https://nvd.nist.gov/vuln/detail/CVE-2026-102497)
- [https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k](https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k)
- [http://www.openwall.com/lists/oss-security/2026/09/29/17](http://www.openwall.com/lists/oss-security/2026/09/29/17)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)