# CVE-2026-62685

## Summary

- **CVE ID:** CVE-2026-62685
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-647, CWE-706
- **Published:** Jul 15, 2026
- **Last Modified:** Jul 20, 2026

## Description

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.

## Affected Products

- filebrowser — filebrowser (< 2.63.17)

## References

- [CNA](https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7rc3-g7h6-22m7)
- [CNA](https://github.com/filebrowser/filebrowser/commit/883a36f02fcb69566a8628cb47f18fdc73348387)
- [CNA](https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.55%
- **EPSS Percentile:** 44.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._