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CVE-2026-102496

Apache XMLSchema: Denial of service through deeply nested schema structures

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-102496

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-102496

Published

org.apache.ws.xmlschema:xmlschema-core

https://repo.maven.apache.org/maven2

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Apache Software Foundation",
                    "product": "Apache XMLSchema",
                    "packageURL": "pkg:maven/org.apache.ws.xmlschema/xmlschema-core",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "2.3.3",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "collectionURL": "https://repo.maven.apache.org/maven2",
                    "packageName": "org.apache.ws.xmlschema:xmlschema-core"
                }

Original source record · Cite this exact observation · Complete original publisher JSON