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CVE-2026-70657— Copyparty: file/dirkey confusion

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.

ed motivations是ed个人开发者开源的一个文件共享服务器。 ed motivations 1.20.17之前版本存在安全漏洞，该漏洞源于dk或dks目录键标志与fk或fka文件键标志结合使用时，可将有效文件键转换为目录键，授予对包含文件夹的读取访问权限。

CVSS 4.3 · Medium EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
9001 copyparty < 1.20.17 affected
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I. Basic Information for CVE-2026-70657

Vulnerability Information
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Vulnerability Title
Copyparty: file/dirkey confusion
Source: CVE Program / CVE List V5
Vulnerability Description
Copyparty is a portable file server. Prior to 1.20.17, copyparty volumes with the dk or dks directory-key flag combined with the fk or fka file-key flag can convert a valid file key into a directory key, granting read access to the containing folder. This vulnerability was only reachable if both types of keys (filekeys and dirkeys) were manually enabled in the volume flags simultaneously. This issue is fixed in version 1.20.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
ed motivations 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ed motivations是ed个人开发者开源的一个文件共享服务器。 ed motivations 1.20.17之前版本存在安全漏洞，该漏洞源于dk或dks目录键标志与fk或fka文件键标志结合使用时，可将有效文件键转换为目录键，授予对包含文件夹的读取访问权限。
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
9001 copyparty < 1.20.17 -

II. Public POCs for CVE-2026-70657

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III. Intelligence Information for CVE-2026-70657

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Patches & Fixes for CVE-2026-70657 (2)

Vendor Advisories for CVE-2026-70657 (1)

IV. Related Vulnerabilities

Same product: copyparty
Same vendor: 9001
Same weakness: CWE-863

V. Comments for CVE-2026-70657

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