CVE-2026-62685
File Browser: Colliding username normalization gives two users the same home directory
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.55% · top 54% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
- affected < 2.63.17
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/filebrowser/filebrowser/v2GHSA-7rc3-g7h6-22m7 (opens in a new tab)
References (3)
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7rc3-g7h6-22m7 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/filebrowser/filebrowser/commit/883a36f02fcb69566a8628cb47f18fdc73348387 (opens in a new tab)x_refsource_MISC
- https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-7rc3-g7h6-22m7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-62685)Record last updated .