CVE-2026-93353
MEDIUM
6,0
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: low
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM
5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: high
Availability: none
Description
AI Translation Available
copyparty contains a volume restriction bypass vulnerability in its SFTP front end that allows authenticated SFTP users to create, remove, and truncate arbitrary paths outside permitted volume boundaries by exploiting three handlers that bypass the xvol volflag enforcement. The _mkdir, _rmdir, and _chattr handlers construct destination paths using vfs.get(), vn.canonical(), and os.path.join() without invoking the chk_ap access check, enabling attackers to traverse symlinks leaving a volume's top directory and perform unauthorized file creation, deletion, or truncation via SSH_FXP_SETSTAT operations on paths outside any volume the account is authorized to access.
59
Improper Link Resolution Before File Access ('Link Following')
DraftCommon Consequences
Security Scopes Affected:
Confidentiality
Integrity
Access Control
Other
Potential Impacts:
Read Files Or Directories
Modify Files Or Directories
Bypass Protection Mechanism
Execute Unauthorized Code Or Commands
Applicable Platforms
Operating Systems:
Windows, Unix
424
Improper Protection of Alternate Path
DraftCommon Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Gain Privileges Or Assume Identity
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based
https://euriconicacio.github.io/blog/cve-2026-93353-a-volume-guard-enforced-one…
https://www.vulncheck.com/advisories/copyparty-sftp-volume-restriction-bypass-v…