CVE-2026-73569

The record

fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From 5.9.3 until 5.10.1, src/xmlparser/OrderedObjParser.js processes multiple DOCTYPE declarations within a single XML document and passes each declaration's entities through addInputEntities(). addInputEntities() resets maxTotalExpansions and maxExpandedLength every time it is called, allowing additional DOCTYPE declarations to repeatedly reset the configured entity-expansion limits during one parse operation. A crafted XML document can then cause excessive CPU use, event-loop blocking, memory exhaustion, and process termination. This issue is fixed in version 5.10.1.

Affected packages

Related vulnerabilities

• CVE-2026-115506 libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs… CWE-776
• CVE-2026-108357 PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. CWE-776
• CVE-2026-108358 PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. CWE-776
• CVE-2026-108086 ** UNSUPPORTED WHEN ASSIGNED ** Improper restriction of recursive entity references in… CWE-776
• CVE-2026-58234 SAP Process Integration (SOAP Adapter) allows a privileged user to send specially crafted… CWE-776
• CVE-2026-16180 IBM App Connect Enterprise 13.0.1.0 through 13.0.8.1, and 12.0.1.0 through 12.0.12.28 and… CWE-776
• CVE-2026-78681 NLTK versions before 3.10.3 use xml.etree.ElementTree to parse XML in multiple modules… CWE-776
• CVE-2026-3415 The XML and schema validation functionalities within the SchemaValidator Mediator process… CWE-776