CVE-2026-54097
File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix
Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, a low-privileged authenticated user of filebrowser (with create + delete permissions in their own isolated scope) can silently destroy share-link records belonging to any other user — including the administrator — by performing a legitimate DELETE on a file in their own directory whose logical path happens to be a byte-prefix of another user's stored share.Link.Path. The file contents of the victim are not exposed, but the victim's share links are irrevocably wiped. This vulnerability is fixed in 2.63.6.
INFO
Published Date :
June 25, 2026, 5:40 p.m.
Last Modified :
June 25, 2026, 5:40 p.m.
Remotely Exploit :
Yes !
Source :
GitHub_M
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update File Browser to version 2.63.6 or later.
- Verify share links are no longer vulnerable to deletion.
- Review access controls for file operations.
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