CVE-2026-102497CWE-674

CVE-2026-102497

High · published September 29, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
43.8
In the wild
Unconfirmed
What it is

The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service.

Users are recommended to upgrade to version 2.3.3, which fixes this issue.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00528 · 43.8th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-09-29T16:17Z
Affected products (1)
ProductVersionsFixed in
apache/xmlschema< 2.3.32.3.3
References (2)
https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k · [email protected]http://www.openwall.com/lists/oss-security/2026/09/29/17 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 01 OCT 03:44Z
    EPSS moved — → 0%
    epss
  • 29 SEP 11:34Z
    Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker
    cvelistv5