CVE-2026-54094

File Browser: Symlink following lets scoped users read, overwrite, and share files outside their filebrowser scope

State: Published
Severity: 7.5 High
Published: Jun 25, 2026
Updated: Jun 25, 2026
Reserved: Jun 11, 2026

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.14, it does not stop the HTTP file handlers from following symbolic links before they open, serve, write, share, or list a file. As a result, a scoped user — and in some cases an unauthenticated public-share recipient — can cross the intended scope boundary by following a symlink whose path is lexically inside their scope but whose target is outside it. This vulnerability is fixed in 2.63.14.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59 Improper Link Resolution Before File Access ('Link Following')

Affected Products

Product	Versions
filebrowserfilebrowser	< 2.63.14Affected

References

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-239w-m3h6-ch8v

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