CVE-2026-62843
MEDIUMFile Browser: Archive builder turns backslash filenames into path traversal (zip-slip)
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-83xp-526h-j3ww
X_Refsource_Misc x_refsource_misc
https://github.com/filebrowser/filebrowser/commit/8503ba61ff51d48a7313896483d130eb6a5abfe0
X_Refsource_Misc x_refsource_misc
https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17
Scores
CVSS v3
6.8
EPSS
0.0026
EPSS Percentile
17.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-22
CWE-23
Status
published
Products (2)
filebrowser/filebrowser
2.63.6 - 2.63.17Go
filebrowser/filebrowser
>= 2.63.6, < 2.63.17
Published
Jul 15, 2026
Tracked Since
Jul 15, 2026