CVE-2026-55667— File Browser 创建作用域用户通过符号链接删除越权文件漏洞
可能的 ATT&CK 技术 1AI
T1565.003 · Runtime Data Manipulation获取后续新漏洞提醒登录后订阅
一、 漏洞 CVE-2026-55667 基础信息
漏洞信息
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Vulnerability Title
File Browser: Out-of-scope file deletion by a Create-only scoped user via symlink-following RemoveAll in upload failure-cleanup
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.16, a scoped, non-admin File Browser user holding only the Create permission can delete arbitrary files outside their scope (other tenants' data, and the application's own database) via the upload failure-cleanup path. ScopedFs.RemoveAll is the one dereferencing operation that skips the symlink guard every other method enforces. The direct-upload handler runs RemoveAll on the user-controlled path during failed-upload cleanup, gated only by Perm.Create. If an escaping directory symlink already exists inside the user's scope, an authenticated create-only user can delete an out-of-scope target, bypassing both the ScopedFs boundary and the Perm.Delete gate. This vulnerability is fixed in 2.63.16.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: 美国国家漏洞数据库 NVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| filebrowser | filebrowser | < 2.63.16 | - |
二、漏洞 CVE-2026-55667 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-55667 厂商安全公告 (1)
同批安全公告 · filebrowser · 2026-06-25 · 共 10 条
| CVE-2026-54089 | 9.1 CRITICAL | File Browser 代理认证头伪造导致认证绕过漏洞 |
| CVE-2026-54096 | 8.4 HIGH | File Browser 不存在路径的公开共享访问控制漏洞 |
| CVE-2026-54094 | 7.5 HIGH | File Browser 符号链接绕过漏洞，越权读写共享文件 |
| CVE-2026-54091 | 7.5 HIGH | File Browser 公开目录共享路径重基准错误访问控制漏洞 |
| CVE-2026-54092 | 6.5 MEDIUM | File Browser 公共登录 API 拒绝服务漏洞 |
| CVE-2026-54090 | File Browser 通过Shell元字符注入绕过命令白名单漏洞 | |
| CVE-2026-54088 | File Browser 认证绕过远程代码执行漏洞 | |
| CVE-2026-54093 | File Browser 存储文件名含Windows风格反斜杠导致下载压缩包路径穿越 | |
| CVE-2026-54097 | File Browser 通过路径前缀匹配删除未授权分享链接漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-55667
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