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NVD Vulnerability Details :
CVE-2026-27942
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-26 Feb, 2026 | 02:16
Updated At-27 Feb, 2026 | 17:14

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.7LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 4.0
Base score: 2.7
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches
fast-xml-parser_project
fast-xml-parser_project
>>fast-xml-parser>>Versions before 4.5.4(exclusive)
cpe:2.3:a:fast-xml-parser_project:fast-xml-parser:*:*:*:*:*:node.js:*:*
fast-xml-parser_project
fast-xml-parser_project
>>fast-xml-parser>>Versions from 5.0.0(inclusive) to 5.3.8(exclusive)
cpe:2.3:a:fast-xml-parser_project:fast-xml-parser:*:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
CWE-120Primarysecurity-advisories@github.com
CWE ID: CWE-120
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8asecurity-advisories@github.com
Patch
https://github.com/NaturalIntelligence/fast-xml-parser/pull/791security-advisories@github.com
Issue Tracking
Patch
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3security-advisories@github.com
Vendor Advisory
Hyperlink: https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/NaturalIntelligence/fast-xml-parser/pull/791
Source: security-advisories@github.com
Resource:
Issue Tracking
Patch
Hyperlink: https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3
Source: security-advisories@github.com
Resource:
Vendor Advisory
Change History
0Changes found
Details not found