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
- Filebrowser — versions >= 2.63.6, < 2.63.17
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
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.