CVE-2026-77763
MEDIUM
CVSS 6.5
CVE-2026-77763 MEDIUM
Qu'est-ce que c'est ?
The filestore backend in pkg/object/file.go, used for file:// stores and as a common juicefs sync destination, derived every operation's target from path(key), which returned either filepath.Join(d.root, key) or filepath.Clean(d.root + key) with no check that the result stayed beneath the root. Put, Get, Head, Delete, Chmod, Chown, Symlink and Readlink all consumed that value directly. Object keys enumerated from a source object store during a sync are not constrained the way local filesystem names are, so a key containing traversal segments causes juicefs to write attacker-supplied content to a path outside the intended local destination, and no error is returned. An operator syncing from a bucket whose contents they do not fully control, such as a shared or public bucket or one an attacker can write to, is therefore exposed to a file write at an attacker-influenced location. The fix changes path() to return an error and rejects any key whose resolved path escapes the root.
Technologies affectées
Non précisé par la fiche NVD.
Recommandation
Vérifie la disponibilité d'un correctif pour la technologie concernée et applique-le dès que possible. Consulte la fiche NVD pour les références officielles du fournisseur.
Exploits publics connus (0)
Aucun proof-of-concept public trouvé sur GitHub à ce jour. Ça peut changer : les PoC sont souvent publiés plusieurs jours ou semaines après la divulgation.