CVE-2026-62685

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.17, File Browser builds new user scopes from usernames passed through cleanUsername() when Signup=true and CreateUserDir=true, but the many-to-one normalization can collapse usernames such as team/one, team one, and team-one to the same home directory without checking whether the resulting scope is already taken, allowing a second registrant to gain full read and write access to another user's files. This issue is fixed in version 2.63.17.

Score

CVSS 3.1 8.1 High

Status

Deferred - security-advisories@github.com

Published

2026-07-15

Last modified

2026-07-20

Weaknesses

CWE-647, CWE-706

Affected products

• Filebrowser (Filebrowser)

References

• https://github.com/filebrowser/filebrowser/commit/883a36f02fcb69566a8628cb47f18fdc73348387
• https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7rc3-g7h6-22m7