CVE-2026-62843

File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)

Published Jul 15, 2026 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-83xp-526h-j3ww File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)
History
Type Values Removed Values Added
First Time appeared Filebrowser
Filebrowser filebrowser
Vendors & Products Filebrowser
Filebrowser filebrowser
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)
Weaknesses CWE-22
CWE-23
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 15, 2026, 4:32 PM
Reserved
Jul 14, 2026, 9:10 PM
Status
Deferred
Published
Jul 15, 2026, 4:16 PM
Modified
Jul 15, 2026, 6:15 PM