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CVE-2026-35606— File Browser discloses text file content via /api/resources endpoint bypassing Perm.Download check

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 2.63.1之前版本存在安全漏洞，该漏洞源于resourceGetHandler返回完整文本文件内容时未检查Perm.Download权限标志，可能导致下载权限为false的用户通过两种绕过路径读取其范围内的任何文本文件。

AI Predicted 8.6 Difficulty: Easy EPSS 0.39% · P31
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I. Basic Information for CVE-2026-35606

Vulnerability Information
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Vulnerability Title
File Browser discloses text file content via /api/resources endpoint bypassing Perm.Download check
Source: CVE Program / CVE List V5
Vulnerability Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, the resourceGetHandler in http/resource.go returns full text file content without checking the Perm.Download permission flag. All three other content-serving endpoints (/api/raw, /api/preview, /api/subtitle) correctly verify this permission before serving content. A user with download: false can read any text file within their scope through two bypass paths. This vulnerability is fixed in 2.63.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
File Browser 安全漏洞
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 2.63.1之前版本存在安全漏洞，该漏洞源于resourceGetHandler返回完整文本文件内容时未检查Perm.Download权限标志，可能导致下载权限为false的用户通过两种绕过路径读取其范围内的任何文本文件。
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 < 2.63.1 -

II. Public POCs for CVE-2026-35606

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III. Intelligence Information for CVE-2026-35606

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Vendor Advisories for CVE-2026-35606 (1)

Same Patch Batch · filebrowser · 2026-04-07 · 5 CVEs total

CVE-2026-35607 8.1 HIGH File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands
CVE-2026-35585 File Browser has a Command Injection via Hook Runner
CVE-2026-35604 File Browser share links remain accessible after Share/Download permissions are revoked
CVE-2026-35605 File Browser has an access rule bypass via HasPrefix without trailing separator in path ma

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-862

V. Comments for CVE-2026-35606

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