> CVE-2026-26278 [HIGH]

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PUBLISHED
2026-02-19 20:25
MODIFIED
2026-02-19 20:25
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
1.08%
Top 35.1%
DATA SOURCES:
NVD 🔗 2026-02-19 RED HAT 🔗 2026-02-22 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-04 OSV 🔗 2026-02-24

> 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. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it’s possible to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by `processEntities: false` option.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

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

> WEAKNESSES

CWE-776

> CWE DETAILED DESCRIPTIONS

CWE-776: Improper Restriction of Recursive Entity References in DTDs - The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

> 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 4.20.15 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
Important

> GITHUB SECURITY ADVISORY

GHSA-jmr7-xgp7-cmfj HIGH

fast-xml-parser affected by DoS through entity expansion in DOCTYPE (no expansion limit)

AFFECTED PACKAGES:
NPM / fast-xml-parser
>= 5.0.0, < 5.3.6
Fixed in: 5.3.6
NPM / fast-xml-parser
>= 4.1.3, < 4.5.4
Fixed in: 4.5.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

fast-xml-parser affected by DoS through entity expansion in DOCTYPE (no expansion limit)

AFFECTED PACKAGES:
Unknown / Unknown
38 versions affected
ALIASES:
GHSA-jmr7-xgp7-cmfj

> HISTORIQUE DES MODIFICATIONS

Première apparition
19/02/2026 20:25
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') - The product uses XML documents and allows their structure to be defined with a Document Type Definition ...
Nouvelle valeur:
CWE-776: Improper Restriction of Recursive Entity References in DTDs - The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not pr...
📊 ENRICHISSEMENT 01/03/2026 06:46
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') - The product uses XML documents and allows their structure to be defined with a Document Type Definition ...
📊 ENRICHISSEMENT 22/02/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 23:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 22:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 21:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 20:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 19:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 18:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 17:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 16:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 15:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 14:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 13:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
{ "severity_scale": null, "threat_severity": "Important" }
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 12:30
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 20/02/2026 12:30
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 16 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/NaturalIntelligence/fast-xml-parser/commit/910dae5be2de2955e9...
https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.6
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-...
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