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CVE-2026-54096— File Browser: Improper Access Control Occurs via Pre-Created Public Share for a Non-existent Path

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.

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。 filebrowser 2.63.7之前版本存在授权问题漏洞，该漏洞源于在对任意路径发起的POST /api/share/<path>请求中，接受经过身份验证的请求并存储公共共享记录，但未检查目标文件当前是否存在，可能导致稍后在同一路径创建文件时，先前创建的公共共享立即生效，并通过GET /api/public/dl/<hash>暴露新文件。

CVSS 8.4 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
filebrowser filebrowser < 2.63.7 affected
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I. Basic Information for CVE-2026-54096

Vulnerability Information
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Vulnerability Title
File Browser: Improper Access Control Occurs via Pre-Created Public Share for a Non-existent Path
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 2.63.7, `POST /api/share/<path>` accepts an authenticated request for an arbitrary path and stores a public share record without checking whether the target file currently exists. Later, when a file is created at that same path, the previously created public share immediately becomes valid and exposes the new file through `GET /api/public/dl/<hash>`. This vulnerability is fixed in 2.63.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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。 filebrowser 2.63.7之前版本存在授权问题漏洞，该漏洞源于在对任意路径发起的POST /api/share/<path>请求中，接受经过身份验证的请求并存储公共共享记录，但未检查目标文件当前是否存在，可能导致稍后在同一路径创建文件时，先前创建的公共共享立即生效，并通过GET /api/public/dl/<hash>暴露新文件。
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 < 2.63.7 -

II. Public POCs for CVE-2026-54096

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8720 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-54096

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Vendor Advisories for CVE-2026-54096 (1)

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

CVE-2026-54089 9.1 CRITICAL File Browser: Authentication Bypass via Proxy Auth Header Forgery
CVE-2026-55667 8.2 HIGH File Browser: Out-of-scope file deletion by a Create-only scoped user via symlink-followin
CVE-2026-54094 7.5 HIGH File Browser: Symlink following lets scoped users read, overwrite, and share files outside
CVE-2026-54091 7.5 HIGH File Browser: Incorrect access control in public directory shares via rule path rebasing
CVE-2026-54092 6.5 MEDIUM File Browser: DoS Vulnerability on Public Login API
CVE-2026-54090 File Browser: Command Allowlist Bypass via Shell Metacharacter Injection
CVE-2026-54088 File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentica
CVE-2026-54093 File Browser: Path traversal in download-as-zip/tar via Windows-style backslash separators
CVE-2026-54097 File 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-863

V. Comments for CVE-2026-54096

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