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CVE-2026-73569

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.7 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • fast-xml-parser

    Versions
    • >= 5.9.3, < 5.10.1: Affected

    No fix published

  • node-webfont Debian:13

    Versions
    • 11.4.0+dfsg2+~cs35.7.26-13
    • 11.4.0+dfsg2+~cs35.7.26-14
    • 11.4.0+dfsg2+~cs35.7.26-15
    • 11.4.0+dfsg2+~cs35.7.26-16
    • 11.4.0+dfsg2+~cs35.7.26-18
    • 11.4.0+dfsg2+~cs35.7.26-19
    • 11.4.0+dfsg2+~cs35.7.26-20
    • 11.4.0+dfsg2+~cs35.7.26-21
    • 11.4.0+dfsg2+~cs35.7.26-22
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-webfont Debian:14

    Versions
    • 11.4.0+dfsg2+~cs35.7.26-13
    • 11.4.0+dfsg2+~cs35.7.26-14
    • 11.4.0+dfsg2+~cs35.7.26-15
    • 11.4.0+dfsg2+~cs35.7.26-16
    • 11.4.0+dfsg2+~cs35.7.26-18
    • 11.4.0+dfsg2+~cs35.7.26-19
    • 11.4.0+dfsg2+~cs35.7.26-20
    • 11.4.0+dfsg2+~cs35.7.26-21
    • 11.4.0+dfsg2+~cs35.7.26-22
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • fast-xml-parser npm

    Affected ranges
    • SEMVER: ≥ 5.9.3, < 5.10.1

    Update to 5.10.1

  • node-webfont Ubuntu:24.04:LTS

    Versions
    • 11.4.0+dfsg2+~cs35.7.26-7ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-webfont Ubuntu:26.10

    Versions
    • 11.4.0+dfsg2+~cs35.7.26-18
    • 11.4.0+dfsg2+~cs35.7.26-19
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-webfont Ubuntu:26.04:LTS

    Versions
    • 11.4.0+dfsg2+~cs35.7.26-13ubuntu2
    • 11.4.0+dfsg2+~cs35.7.26-14
    • 11.4.0+dfsg2+~cs35.7.26-15
    • 11.4.0+dfsg2+~cs35.7.26-16build1
    • 11.4.0+dfsg2+~cs35.7.26-18
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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