CVE-2026-54093: Filebrowser

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, filebrowser builds the download-as-zip / download-as-tar archive entry names with filepath.ToSlash, which on a Linux host is a no-op for backslashes (\ is only a path separator on Windows). A file whose name contains Windows-style traversal is accepted by the resource handlers, stored on the Linux filesystem with a literal backslash name, and then emitted verbatim as the archive entry name. Windows extractors interpret \ as a path separator and write the extracted file outside the extraction directory — arbitrary file write on the victim who downloads and extracts the archive. This vulnerability is fixed in 2.63.6.

Affected products

• Filebrowser Filebrowser: before 2.63.6 (fixed in 2.63.6)

Published 2026-06-25. Last modified 2026-06-25.