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CVE-2026-35607— File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands

Quick assessment

Affected
filebrowser filebrowser
Exploitation
Public or AI PoC available; prioritize validation
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，该漏洞源于代理身份验证处理程序未应用与注册处理程序相同的修复，导致通过代理身份验证首次登录自动创建的用户被授予执行能力，可能导致权限提升。

CVSS 8.1 · High EPSS 0.56% · P45
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I. Basic Information for CVE-2026-35607

Vulnerability Information
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Vulnerability Title
File Browser: Proxy auth auto-provisioned users inherit Execute permission and Commands
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 fix in commit b6a4fb1 ("self-registered users don't get execute perms") stripped Execute permission and Commands from users created via the signup handler. The same fix was not applied to the proxy auth handler. Users auto-created on first successful proxy-auth login are granted execution capabilities from global defaults, even though the signup path was explicitly changed to prevent execution rights from being inherited by automatically provisioned accounts. This vulnerability is fixed in 2.63.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
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，该漏洞源于代理身份验证处理程序未应用与注册处理程序相同的修复，导致通过代理身份验证首次登录自动创建的用户被授予执行能力，可能导致权限提升。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
filebrowser filebrowser < 2.63.1 -

II. Public POCs for CVE-2026-35607

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7445 chars
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III. Intelligence Information for CVE-2026-35607

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Vendor Advisories for CVE-2026-35607 (1)

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

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-2026-35606 File Browser discloses text file content via /api/resources endpoint bypassing Perm.Downlo
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-269

V. Comments for CVE-2026-35607

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