Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M
CVE-2026-62843File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)
Medium 6.8
In plain English
A medium-severity path traversal in filebrowser from filebrowser. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% 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. 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/filebrowser/filebrowser | no fix listed | GO-2026-6026 |
| Go | github.com/filebrowser/filebrowser/v2 | 2.63.17 | GHSA-83xp-526h-j3ww |
| Go | github.com/filebrowser/filebrowser/v2 | 2.63.17 | GO-2026-6026 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | >= 2.63.6, < 2.63.17 |
Weakness: CWE-22, CWE-23 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N