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CVE-2026-28492— File Browser: Path Traversal in Public Share Links Exposes Files Outside Shared Directory

Quick assessment

Affected
filebrowser 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.

File Browser是File Browser开源的一个文件管理界面，在指定的目录，它可以用来上传，删除，预览和编辑文件。 File Browser 2.61.0之前版本存在信息泄露漏洞，该漏洞源于创建目录的公共共享链接时，http/public.go中的withHashFile中间件使用filepath.Dir(link.Path)计算BasePathFs根目录，可能导致拥有共享链接的任何人都能浏览和下载所有同级目录中的文件。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.48% · P39

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-28492

Vulnerability Information
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Vulnerability Title
File Browser: Path Traversal in Public Share Links Exposes Files Outside Shared Directory
Source: CVE Program / CVE List V5
Vulnerability Description
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to version 2.61.0, when a user creates a public share link for a directory, the withHashFile middleware in http/public.go uses filepath.Dir(link.Path) to compute the BasePathFs root. This sets the filesystem root to the parent directory instead of the shared directory itself, allowing anyone with the share link to browse and download files from all sibling directories. This issue has been patched in version 2.61.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
File Browser 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
File Browser是File Browser开源的一个文件管理界面，在指定的目录，它可以用来上传，删除，预览和编辑文件。 File Browser 2.61.0之前版本存在信息泄露漏洞，该漏洞源于创建目录的公共共享链接时，http/public.go中的withHashFile中间件使用filepath.Dir(link.Path)计算BasePathFs根目录，可能导致拥有共享链接的任何人都能浏览和下载所有同级目录中的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
filebrowser filebrowser < 2.61.0 -

II. Public POCs for CVE-2026-28492

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III. Intelligence Information for CVE-2026-28492

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Patches & Fixes for CVE-2026-28492 (1)

Vendor Advisories for CVE-2026-28492 (1)

Vendor Pages for CVE-2026-28492 (1)

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-200

V. Comments for CVE-2026-28492

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