CVE-2026-72836
Gravedad CVSS v4.0:
CRÍTICA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
14/08/2026
Última modificación:
08/09/2026
Descripción
*** Pendiente de traducción *** FileBrowser before 2.63.19 does not account for case-insensitive filesystems when checking home directory ownership during self-registration. When Signup and CreateUserDir are enabled and FileBrowser's root is on a case-insensitive filesystem (confirmed on Windows/NTFS), two self-registered usernames that differ only in letter case (e.g., CaseVictim and casevictim) are stored as distinct accounts but resolve to the same physical home directory, because the scope-ownership check compares the persisted scope as an exact case-sensitive string. A second registrant can therefore read, overwrite, and delete another account's files through authenticated HTTP endpoints, without needing an existing account or victim interaction.
Impacto
Puntuación base 4.0
9.20
Gravedad 4.0
CRÍTICA
Puntuación base 3.x
8.10
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/filebrowser/filebrowser/commit/fe7efb2e6afe66774cd86a5b0a03033bd514d0c0
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-576v-w77m-gr84
- https://www.vulncheck.com/advisories/filebrowser-before-case-sensitivity-authentication-bypass
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-576v-w77m-gr84