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CVE-2026-72837— File Browser before 2.63.20 Privilege Escalation via Proxy Authentication

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 2.63.20之前版本存在权限许可和访问控制问题漏洞，该漏洞源于代理和钩子身份验证自动配置路径中未能遵循createUserDir隔离，可能导致具有有效上游认证凭据的攻击者利用服务器根作用域分配读取、修改、删除和共享其他用户的文件。

CVSS 8.8 · High EPSS 0.56% · P45

Affected Version Matrix 2

VendorProduct Version RangeStatus
filebrowser filebrowser < 2.63.20 affected
2.63.20 unaffected
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I. Basic Information for CVE-2026-72837

Vulnerability Information
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Vulnerability Title
File Browser before 2.63.20 Privilege Escalation via Proxy Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
File Browser 权限许可和访问控制问题漏洞
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 2.63.20之前版本存在权限许可和访问控制问题漏洞，该漏洞源于代理和钩子身份验证自动配置路径中未能遵循createUserDir隔离，可能导致具有有效上游认证凭据的攻击者利用服务器根作用域分配读取、修改、删除和共享其他用户的文件。
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 0 ~ 2.63.20 -

II. Public POCs for CVE-2026-72837

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9203 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-2026-72837

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Vendor Advisories for CVE-2026-72837 (2)

Same Patch Batch · filebrowser · 2026-08-14 · 5 CVEs total

CVE-2026-72836 8.1 HIGH FileBrowser before 2.63.19 Case Sensitivity Authentication Bypass
CVE-2026-72835 6.8 MEDIUM filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization
CVE-2026-72838 6.5 MEDIUM FileBrowser before 2.63.19 Disk Exhaustion via TUS Upload
CVE-2026-72834 4.3 MEDIUM filebrowser before 2.63.19 Permission Bypass via checksum

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-284

V. Comments for CVE-2026-72837

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