CVE-2026-73569 - fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits

CVE-2026-73569 - fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits

https://cvefeed.io/rssfeed/latest.atom / Thu, 08/13/2026 - 22:26
CVE ID :CVE-2026-73569
Published : Aug. 13, 2026, 6:18 p.m. | 1 hour, 10 minutes ago
Description :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.
Severity: 8.7 | HIGH
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