> CVE-2026-27944 [CRITICAL]

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PUBLISHED
2026-03-05 19:16
MODIFIED
2026-03-05 19:38
CVSS_SCORE V3
9.8
EPSS (Prob. Exploit)
1.01%
Top 37.0%
🎯 NUCLEI TEMPLATE
DATA SOURCES:
NVD 🔗 2026-03-05 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-05 OSV 🔗 2026-09-13 NUCLEI 🔗 2026-11-08

> DESCRIPTION

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.

> 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:H/I:H/A:H
EXPLOITABILITY
3.9
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/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
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
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-306 CWE-311

> CWE DETAILED DESCRIPTIONS

CWE-306: Missing Authentication for Critical Functionality - The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. | CWE-311: Missing Encryption of Sensitive Data - The product does not encrypt sensitive or critical information before storage or transmission.

> GITHUB SECURITY ADVISORY

GHSA-g9w5-qffc-6762 CRITICAL

Nginx-UI Vulnerable to Unauthenticated Backup Download with Encryption Key Disclosure

AFFECTED PACKAGES:
GO / github.com/0xJacky/Nginx-UI
< 2.3.3
Fixed in: 2.3.3

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure

AFFECTED PACKAGES:
Unknown / Unknown
184 versions affected
ALIASES:
GHSA-g9w5-qffc-6762, GO-2026-4614

> NUCLEI TEMPLATES

Des templates Nuclei sont disponibles pour scanner cette vulnérabilité.

🎯
CVE-2026-27944.yaml
http/cves/2026/CVE-2026-27944.yaml
Usage: nuclei -t http/cves/2026/CVE-2026-27944.yaml -u target.com

> HISTORIQUE DES MODIFICATIONS

Première apparition
05/03/2026 19:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-306: Missing Authentication for Critical Function - The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of res...
Nouvelle valeur:
CWE-306: Missing Authentication for Critical Functionality - The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount o...
📊 ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-306: Missing Authentication for Critical Function - The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of res...
Total des modifications: 2 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762
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