CVE-2026-62843

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.63.6 to 2.63.16, File Browser's archive builder uses strings.ReplaceAll(nameInArchive, "\", "/"), which turns a POSIX filename such as ..\..\evil.sh into the archive entry ../../evil.sh, allowing a user with upload permission to plant a backslash-named file that escapes the extraction directory when another user downloads and extracts the generated zip or tar archive. This issue is fixed in version 2.63.17.

Score

CVSS 3.1 6.8 Medium

Status

Deferred - security-advisories@github.com

Published

2026-07-15

Last modified

2026-07-15

Weaknesses

CWE-22, CWE-23

Affected products

• Filebrowser (Filebrowser)

References

• https://github.com/filebrowser/filebrowser/commit/8503ba61ff51d48a7313896483d130eb6a5abfe0
• https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-83xp-526h-j3ww