CVE-2026-102497

The Apache XmlSchema walker (xmlschema-walker) is vulnerable to a denial of service because it fails to detect cycles in type derivation, substitution groups, model groups, or attribute groups. A malicious schema containing such cycles can cause the walker to recurse indefinitely until a stack ov...

CVE-2026-102497 Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker

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 t...