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CVE-2026-116682— FileBrowser Quantum: Symlink following escapes user scope allowing arbitrary file read outside the served directory

Quick assessment

Affected
gtsteffaniak filebrowser
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FileBrowser Quantum 是一款免费、可自托管的基于 Web 的文件管理器。在 1.5.2-stable 和 2.0.1-beta 版本之前，后端文件读取处理逻辑（位于 ）在解析符号链接时，通过 函数获取目标路径，但未验证解析后的目标是否仍位于源根目录及用户授权范围内。因此，若启用了 选项，下载、预览、媒体播放、OnlyOffice 集成以及公共分享等读取流程，均可能通过一个位于授权范围内的符号链接，访问到超出授权范围的目标文件。拥有下载权限的已认证用户可以读取服务器可访问但不在其授权范围内的文件；而

CVSS 8.6 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
gtsteffaniak filebrowser < 1.5.2-stable affected
>= 2.0.0-beta, < 2.0.1-beta affected
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I. Basic Information for CVE-2026-116682

Vulnerability Information
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Vulnerability Title
FileBrowser Quantum: Symlink following escapes user scope allowing arbitrary file read outside the served directory
Source: CVE Program / CVE List V5
Vulnerability Description
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.5.2-stable and 2.0.1-beta, file read handling in backend/pkg/indexing/indexingFiles.go resolves symbolic links through GetRealPath without confirming that the resolved target remains inside the source root and the user's authorized scope. Download, preview, media, OnlyOffice, and public-share read flows that enable FollowSymlinks can therefore serve an out-of-scope target through a reachable in-scope symlink. An authenticated user with download access can read server-accessible files outside the assigned scope, and a holder of a public share link can do the same without an account when the shared directory exposes such a symlink. This issue is fixed in 1.5.2-stable and 2.0.1-beta.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
gtsteffaniak filebrowser < 1.5.2-stable -

II. Public POCs for CVE-2026-116682

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III. Intelligence Information for CVE-2026-116682

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Other References for CVE-2026-116682 (7)

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: gtsteffaniak
Same weakness: CWE-22