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CVE-2026-73612— File Browser before v2.63.22 Authorization Bypass via Recursive Operations

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组织的一款文件浏览管理软件。 File Browser 2.63.22之前版本存在授权问题漏洞，该漏洞源于在递归复制、重命名和删除操作期间未验证后代的访问规则，可能导致经过身份验证的用户绕过基于路径的访问控制，通过操作允许的父目录复制、重命名或删除被拒绝的文件，破坏基于规则的隔离，影响机密性和完整性。

CVSS 8.1 · High EPSS 0.48% · P39

Affected Version Matrix 2

VendorProduct Version RangeStatus
filebrowser filebrowser < 2.63.22 affected
2.63.22 unaffected
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I. Basic Information for CVE-2026-73612

Vulnerability Information
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Vulnerability Title
File Browser before v2.63.22 Authorization Bypass via Recursive Operations
Source: CVE Program / CVE List V5
Vulnerability Description
File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
File Browser 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
File Browser是File Browser组织的一款文件浏览管理软件。 File Browser 2.63.22之前版本存在授权问题漏洞，该漏洞源于在递归复制、重命名和删除操作期间未验证后代的访问规则，可能导致经过身份验证的用户绕过基于路径的访问控制，通过操作允许的父目录复制、重命名或删除被拒绝的文件，破坏基于规则的隔离，影响机密性和完整性。
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 0 ~ 2.63.22 -

II. Public POCs for CVE-2026-73612

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9829 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-73612

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Patches & Fixes for CVE-2026-73612 (1)

Vendor Advisories for CVE-2026-73612 (1)

Other References for CVE-2026-73612 (1)

Same Patch Batch · filebrowser · 2026-08-13 · 4 CVEs total

CVE-2026-72839 9.8 CRITICAL filebrowser through 2.63.16 Privilege Escalation via Signup
CVE-2026-73613 8.2 HIGH filebrowser before 2.63.19 Out-of-Scope File Deletion via Symlink
CVE-2026-73611 6.8 MEDIUM File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-639

V. Comments for CVE-2026-73612

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