CVE-2026-73569

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/NaturalIntelligence/fast-xml-parser/commit/4e546e03987662de5495d050b5fba26bea65383f
https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.10.1
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-8r6m-32jq-jx6q

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-13 18:18

Updated : 2026-08-13 19:17

NVD link : CVE-2026-73569

Mitre link : CVE-2026-73569

CVE.ORG link : CVE-2026-73569

JSON object : View

Products Affected

No product.

CWE

CWE-776

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

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