Vulnerability Details CVE-2026-27942
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prior to version 5.3.8, the application crashes with stack overflow when user use XML builder with `preserveOrder:true`. Version 5.3.8 fixes the issue. As a workaround, use XML builder with `preserveOrder:false` or check the input data before passing to builder.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.9%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-27942
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cpe:2.3:a:naturalintelligence:fast-xml-parser:-
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cpe:2.3:a:naturalintelligence:fast-xml-parser:1.0.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:1.1.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:1.1.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.0.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.1.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.2.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.2.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.3.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.3.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.4.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.4.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.4.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.5.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.5.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.6.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.7.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.7.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.7.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.7.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.7.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.8.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.8.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.8.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.8.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.9.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.9.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.9.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.9.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:2.9.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.0.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.0.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.10.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.11.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.11.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.11.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.10
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.11
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.12
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.13
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.14
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.16
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.17
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.18
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.19
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.20
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.21
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.7
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.8
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.12.9
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.13.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.14.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.15.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.15.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.16.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.17.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.18.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.19.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.2.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.2.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.2.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.2.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.2.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.20.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.20.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.20.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.20.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.21.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.21.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.7
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.8
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.3.9
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.4.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.9.10
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cpe:2.3:a:naturalintelligence:fast-xml-parser:3.9.11
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.10
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.11
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.12
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.13
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.14
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.15
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.7
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.8
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.0.9
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.1.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.1.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.1.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.1.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.1.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.2.7
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.3.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.4.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.4.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.5.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.5.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.5.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:4.5.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.7
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.8
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.0.9
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.1.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.2.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.0
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.1
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.2
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.3
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.4
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.5
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.6
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cpe:2.3:a:naturalintelligence:fast-xml-parser:5.3.7