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CVE-2026-35585— File Browser has a Command Injection via Hook Runner

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 2.0.0至2.63.1版本存在参数注入漏洞，该漏洞源于钩子系统对变量替换的清理不足，可能导致具有文件写入权限的攻击者通过特制文件名注入shell元字符，导致远程代码执行。

AI Predicted 8.8 Difficulty: Easy EPSS 2.38% · P83

Affected Version Matrix 1

VendorProduct Version RangeStatus
filebrowser filebrowser >= 2.0.0-rc.1, < 2.33.8 affected
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I. Basic Information for CVE-2026-35585

Vulnerability Information
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Vulnerability Title
File Browser has a Command Injection via Hook Runner
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. From 2.0.0 until 2.33.8, the hook system in File Browser — which executes administrator-defined shell commands on file events such as upload, rename, and delete — is vulnerable to OS command injection. Variable substitution for values like $FILE and $USERNAME is performed via os.Expand without sanitization. An attacker with file write permission can craft a malicious filename containing shell metacharacters, causing the server to execute arbitrary OS commands when the hook fires. This results in Remote Code Execution (RCE). This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
File Browser 参数注入漏洞
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 2.0.0至2.63.1版本存在参数注入漏洞，该漏洞源于钩子系统对变量替换的清理不足，可能导致具有文件写入权限的攻击者通过特制文件名注入shell元字符，导致远程代码执行。
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 >= 2.0.0-rc.1, < 2.33.8 -

II. Public POCs for CVE-2026-35585

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III. Intelligence Information for CVE-2026-35585

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Vendor Advisories for CVE-2026-35585 (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-2026-35604 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-78

V. Comments for CVE-2026-35585

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