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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-104102— copyparty FTP: upload outside defined volumes (limited path traversal)

Quick assessment

Affected
9001 copyparty
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.

copyparty 是一款便携式文件服务器。在 1.20.19 版本之前，FTP 上传路径处理未将目标文件限制在配置的 copyparty 卷内。当显式启用 FTP 或 FTPS 时，低权限的已认证用户可在上传过程中提交路径遍历（traversal）路径，从而在 copyparty 进程具有写入权限的任何位置，于已配置的卷之外创建新文件。攻击者无法读取或覆盖现有文件，输出文件名会被附加一个随机后缀，且 copyparty 本身不会执行该文件；但同一主机上运行的其他无关软件可能会处理这些新创建的文件。此问题已在 1.

CVSS 5.3 · Medium EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1105 · Ingress Tool Transfer

Affected Version Matrix 1

VendorProduct Version RangeStatus
9001 copyparty < 1.20.19 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-104102

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
copyparty FTP: upload outside defined volumes (limited path traversal)
Source: CVE Program / CVE List V5
Vulnerability Description
copyparty is a portable file server. Prior to 1.20.19, FTP upload path handling does not confine destinations to configured copyparty volumes. When FTP or FTPS is explicitly enabled, a low-privileged authenticated user can submit traversal paths during upload to create a new file outside configured volumes wherever the copyparty process has write permission. The attacker cannot read or overwrite files, the output name receives a randomized suffix, and copyparty does not execute the file; however, unrelated software on the same host could process the newly created file. This issue is fixed in version 1.20.19.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA: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

Affected Products

Vendor Product Affected Versions CPE Subscribe
9001 copyparty < 1.20.19 -

II. Public POCs for CVE-2026-104102

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-104102

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-104102 (2)

Vendor Advisories for CVE-2026-104102 (1)

IV. Related Vulnerabilities

Same product: copyparty
Same vendor: 9001
Same weakness: CWE-22

V. Comments for CVE-2026-104102

No comments yet

Leave a comment