CVE-2026-102497: Vulnerability in Apache Software Foundation Apache XMLSchema
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.
AI Analysis
Technical Summary
The Apache XMLSchema xmlschema-walker does not detect cycles in schema constructs such as type derivation, substitution groups, model groups, or attribute groups. A maliciously crafted XML schema containing such cycles can cause the walker to recurse indefinitely until a stack overflow occurs, causing a denial of service condition. This vulnerability affects all versions from 0 up to but not including 2.3.3. Upgrading to version 2.3.3 addresses the issue.
Potential Impact
An attacker can cause a denial of service by submitting a malicious XML schema that triggers infinite recursion in the xmlschema-walker, leading to a stack overflow and application crash or unavailability. There is no indication of code execution or data breach from this vulnerability.
Mitigation Recommendations
Users should upgrade Apache XMLSchema to version 2.3.3 or later, where this vulnerability is fixed. No other mitigations are indicated or necessary.
CVE-2026-102497: Vulnerability in Apache Software Foundation Apache XMLSchema
Description
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.
Affected software
Apache Software Foundation
Apache XMLSchema
pkg:maven/Apache Software Foundation/org.apache.ws.xmlschema:xmlschema-walkerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache XMLSchema xmlschema-walker does not detect cycles in schema constructs such as type derivation, substitution groups, model groups, or attribute groups. A maliciously crafted XML schema containing such cycles can cause the walker to recurse indefinitely until a stack overflow occurs, causing a denial of service condition. This vulnerability affects all versions from 0 up to but not including 2.3.3. Upgrading to version 2.3.3 addresses the issue.
Potential Impact
An attacker can cause a denial of service by submitting a malicious XML schema that triggers infinite recursion in the xmlschema-walker, leading to a stack overflow and application crash or unavailability. There is no indication of code execution or data breach from this vulnerability.
Mitigation Recommendations
Users should upgrade Apache XMLSchema to version 2.3.3 or later, where this vulnerability is fixed. No other mitigations are indicated or necessary.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-09-29T10:42:55.336Z
- State
- PUBLISHED
Threat ID: 6abba594f7a7c541065281e3
Added to database: 09/29/2026, 11:48:36 UTC
Last enriched: 09/29/2026, 12:02:52 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 11
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