Vulnerability · Published Jun 25, 2026 · Assigned by GitHub_M
CVE-2026-54097File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix
High 7.2
In plain English
A high-severity authorization bypass via user-controlled key in filebrowser from filebrowser. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/filebrowser/filebrowser | no fix listed | GHSA-5ww9-jg6q-38r7 |
| Go | github.com/filebrowser/filebrowser | no fix listed | GO-2026-5159 |
| Go | github.com/filebrowser/filebrowser/v2 | 2.63.6 | GHSA-5ww9-jg6q-38r7 |
| Go | github.com/filebrowser/filebrowser/v2 | 2.63.6 | GO-2026-5159 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | < 2.63.6 |
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N