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Apache XMLSchema: Denial of service through deeply nested schema structures

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-102496

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-102496

Apache XMLSchema

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache XMLSchema",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.3.3",
        "versionType": "semver"
      }
    ],
    "packageURL": "pkg:maven/org.apache.ws.xmlschema/xmlschema-core",
    "packageName": "org.apache.ws.xmlschema:xmlschema-core",
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-102496

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#4005 · Revision 1
Added to Heist Feed
Publisher date
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