> CVE-2026-63293 [CRITICAL]

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PUBLISHED
2026-08-12 20:17
MODIFIED
2026-08-12 20:17
CVSS_SCORE V3
9.9
EPSS (Prob. Exploit)
0.59%
Top 52.3%
DATA SOURCES:
NVD 🔗 2026-08-12 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-08-19

> DESCRIPTION

A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.

> 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:L/UI:N/S:C/C:H/I:H/A:H
EXPLOITABILITY
3.1
IMPACT
6.0

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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
Changed (C)
Impact s'étend au-delà 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-59

> CWE DETAILED DESCRIPTIONS

CWE-59: Improper Link Resolution Before File Access - The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root

AFFECTED PACKAGES:
Unknown / Unknown
34 versions affected
ALIASES:
GHSA-j825-cg34-5fr5

> HISTORIQUE DES MODIFICATIONS

Première apparition
12/08/2026 20:17
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-59: Improper Link Resolution Before File Access ('Link Following') - The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a ...
Nouvelle valeur:
CWE-59: Improper Link Resolution Before File Access - The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut th...
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-59: Improper Link Resolution Before File Access ('Link Following') - The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a ...
Total des modifications: 2 Dernière mise à jour: 7 hours ago

> REFERENCES

https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5
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