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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-62843— File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)

Quick assessment

Affected
filebrowser filebrowser
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 2.63.6版本至2.63.16版本存在路径遍历漏洞，该漏洞源于归档构建器使用strings.ReplaceAll导致文件名替换问题，允许具有上传权限的用户植入反斜杠命名的文件，当其他用户下载并提取生成的zip或tar归档时，文件会逃逸提取目录。

CVSS 6.8 · Medium EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
filebrowser filebrowser >= 2.63.6, < 2.63.17 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-62843

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: Archive builder turns backslash filenames into path traversal (zip-slip)
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. From 2.63.6 to 2.63.16, File Browser's archive builder uses strings.ReplaceAll(nameInArchive, "\", "/"), which turns a POSIX filename such as ..\..\evil.sh into the archive entry ../../evil.sh, allowing a user with upload permission to plant a backslash-named file that escapes the extraction directory when another user downloads and extracts the generated zip or tar archive. This issue is fixed in version 2.63.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
FileBrowser 路径遍历漏洞
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 2.63.6版本至2.63.16版本存在路径遍历漏洞，该漏洞源于归档构建器使用strings.ReplaceAll导致文件名替换问题，允许具有上传权限的用户植入反斜杠命名的文件，当其他用户下载并提取生成的zip或tar归档时，文件会逃逸提取目录。
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 >= 2.63.6, < 2.63.17 -

II. Public POCs for CVE-2026-62843

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-62843

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-62843 (1)

Vendor Advisories for CVE-2026-62843 (1)

Vendor Pages for CVE-2026-62843 (1)

Same Patch Batch · filebrowser · 2026-07-15 · 3 CVEs total

CVE-2026-62685 8.1 HIGH File Browser: Colliding username normalization gives two users the same home directory
CVE-2026-62683 3.1 LOW File Browser: Trailing-slash delete leaves a stale public share behind

IV. Related Vulnerabilities

Same product: filebrowser
Same vendor: filebrowser
Same weakness: CWE-22

V. Comments for CVE-2026-62843

No comments yet

Leave a comment