> CVE-2026-27942 [LOW]

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PUBLISHED
2026-02-26 02:16
MODIFIED
2026-02-26 02:16
CVSS_SCORE V3
2.7
EPSS (Prob. Exploit)
0.54%
Top 54.1%
DATA SOURCES:
NVD 🔗 2026-02-26 RED HAT 🔗 2026-03-01 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-08

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_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

> MÉTRIQUES CVSS DÉTAILLÉES

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
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-120

> CWE DETAILED DESCRIPTIONS

CWE-120: Buffer Copy without Checking Size of Input - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Developer Hub 1.8.5 release.
Red Hat Developer Hub 1.8.5 has been released.
Red Hat Security Advisory: Red Hat Developer Hub 1.9.3 release.
Red Hat Developer Hub 1.9.3 has been released.
Red Hat Security Advisory: RHACS 4.9.5 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: RHACS 4.8.10 security and bug fix update
Updated images are now available for Red Hat Advanced Cluster Security (RHACS), which typically include new features, bug fixes, and/or security patches.
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.10 security, enhancement & bug fix update
Red Hat OpenShift Data Foundation 4.20.10 security, enhancement & bug fix update
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.15 security, enhancement & bug fix update
Red Hat OpenShift Data Foundation 4.20.15 security, enhancement & bug fix update
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.19.20 security, enhancement & bug fix update
Red Hat OpenShift Data Foundation 4.19.20 security, enhancement & bug fix update
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.25 security, enhancement & bug fix update
Red Hat OpenShift Data Foundation 4.18.25 security, enhancement & bug fix update
Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-frontend-rhel9 container image
A new satellite/iop-host-inventory-frontend-rhel9 container image is now generally available in the Red Hat container registry.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> GITHUB SECURITY ADVISORY

GHSA-fj3w-jwp8-x2g3 LOW

fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

AFFECTED PACKAGES:
NPM / fast-xml-parser
>= 4.0.0-beta.0, < 4.5.4
Fixed in: 4.5.4
NPM / fast-xml-parser
>= 5.0.0, < 5.3.8
Fixed in: 5.3.8

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

AFFECTED PACKAGES:
Unknown / Unknown
87 versions affected
ALIASES:
GHSA-fj3w-jwp8-x2g3

> HISTORIQUE DES MODIFICATIONS

Première apparition
26/02/2026 02:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less tha...
Nouvelle valeur:
CWE-120: Buffer Copy without Checking Size of Input - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buf...
📊 ENRICHISSEMENT 01/03/2026 06:46
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less tha...
📊 ENRICHISSEMENT 01/03/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 01/03/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 4 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f1498629...
https://github.com/NaturalIntelligence/fast-xml-parser/pull/791
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-...
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