Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-54088— File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentication RCE)

AI Predicted 9.8 Difficulty: Trivial EPSS 0.63% · P47

Affected Version Matrix 1

VendorProductVersion RangeStatus
filebrowserfilebrowser< 2.63.6affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-54088

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentication RCE)
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 2.63.6, the Hook Authentication feature in File Browser allows administrators to delegate login verification to an external shell command. User-supplied credentials (username and password) are interpolated into this command string using os.Expand without sanitization. An unauthenticated remote attacker can inject shell metacharacters in the username or password field at the login screen, causing the server to execute arbitrary OS commands before any authentication takes place. This is a critical pre-authentication RCE. This vulnerability is fixed in 2.63.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FileBrowser是filebrowser团队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 2.63.6之前版本存在安全漏洞，该漏洞源于Hook Authentication功能处理用户凭据时清理不当，可能导致未经身份验证的远程攻击者在登录界面注入shell元字符，执行任意操作系统命令。
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

VendorProductAffected VersionsCPESubscribe
filebrowserfilebrowser < 2.63.6 -

II. Public POCs for CVE-2026-54088

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-54088

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-54088 (1)

Same Patch Batch · filebrowser · 2026-06-25 · 10 CVEs total

CVE-2026-540899.1 CRITICALFile Browser: Authentication Bypass via Proxy Auth Header Forgery
CVE-2026-540968.4 HIGHFile Browser: Improper Access Control Occurs via Pre-Created Public Share for a Non-existe
CVE-2026-556678.2 HIGHFile Browser: Out-of-scope file deletion by a Create-only scoped user via symlink-followin
CVE-2026-540947.5 HIGHFile Browser: Symlink following lets scoped users read, overwrite, and share files outside
CVE-2026-540917.5 HIGHFile Browser: Incorrect access control in public directory shares via rule path rebasing
CVE-2026-540926.5 MEDIUMFile Browser: DoS Vulnerability on Public Login API
CVE-2026-54090File Browser: Command Allowlist Bypass via Shell Metacharacter Injection
CVE-2026-54093File Browser: Path traversal in download-as-zip/tar via Windows-style backslash separators
CVE-2026-54097File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in De

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-78

V. Comments for CVE-2026-54088

No comments yet

Leave a comment