> CVE-2026-47300 [HIGH]

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PUBLISHED
2026-07-14 19:17
MODIFIED
2026-07-14 19:17
CVSS_SCORE V3
8.8
EPSS (Prob. Exploit)
0.78%
Top 44.6%
DATA SOURCES:
NVD 🔗 2026-07-14 RED HAT 🔗 2026-07-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-10-29 MSRC 🔗 2026-11-02

> DESCRIPTION

Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Hardened Images

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
2.8
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Low (L)
Authentifié avec compte utilisateur basique
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
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-303

> CWE DETAILED DESCRIPTIONS

CWE-303: Incorrect Implementation of Authentication Algorithm - The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
An update for Red Hat Hardened Images RPMs is now available.
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
An update for Red Hat Hardened Images RPMs is now available.
Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update
An update for .NET 10.0 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update
An update for .NET 10.0 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring Syste...
Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update
An update for .NET 10.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vul...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vul...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A...
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vu...
Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update
An update for .NET 8.0 is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vu...

> MICROSOFT SECURITY PATCHES

Cette vulnérabilité est corrigée par les mises à jour Microsoft suivantes :

Security Update KB5104034
Produit : 20839, 20838
Publié le 31/10/2026 • Bulletin 2026-Jul
Security Update KB5104032
Produit : 12414, 12415, 12416
Publié le 31/10/2026 • Bulletin 2026-Jul
Security Update KB5104033
Produit : 12432, 12433, 12434
Publié le 31/10/2026 • Bulletin 2026-Jul
📋 Voir tous les détails sur MSRC Update Guide →

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-8prm-248r-h957 HIGH

Microsoft Security Advisory CVE-2026-47300 – .NET Elevation of Privilege Vulnerability

AFFECTED PACKAGES:
NUGET / Microsoft.AspNetCore.Authentication.Negotiate
>= 8.0.0, <= 8.0.28
Fixed in: 8.0.29
NUGET / Microsoft.AspNetCore.Authentication.Negotiate
>= 9.0.0, <= 9.0.17
Fixed in: 9.0.18
NUGET / Microsoft.AspNetCore.Authentication.Negotiate
>= 10.0.0, <= 10.0.9
Fixed in: 10.0.10

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/07/2026 19:17
Source: NVD
📊 ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-303: Incorrect Implementation of Authentication Algorithm - The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is ...
📊 ENRICHISSEMENT 19/07/2026 05:00
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 19/07/2026 05:00
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 3 months ago

> REFERENCES

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300
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