Path Traversal in Filebrowser

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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.004 (32.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-62843?
CVE-2026-62843 is a medium-severity vulnerability in Filebrowser, classified under Path Traversal. CVSS score: 6.8/10. Published 2026-07-15.
How severe is CVE-2026-62843?
Medium severity. CVSS v3 base score is 6.8 out of 10.