CVE-2026-62843
File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)
MEDIUM 6.8EPSS 0.4%
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.
- Affected
- filebrowser
- CVSS v3.1 GITHUB
- 6.8 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N - EPSS
- 0.39% chance of exploitation in the next 30 days, 32nd percentile
- Published
- 2026-07-15