File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix — CVE-2026-54097

Summary

### Summary 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…

Product

go: github.com/filebrowser/filebrowser | go: github.com/filebrowser/filebrowser/v2

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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