CVE-2026-93353 (GCVE-0-2026-93353)

Vulnerability from cvelistv5 – Published: 2026-09-24 20:29 – Updated: 2026-10-01 15:21 X_Open Source
VLAI
Title
copyparty SFTP Volume Restriction Bypass via mkdir/rmdir/chattr Handlers
Summary
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.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 15:50 UTC
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-424 - Improper Protection of Alternate Path
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7181 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
9001 copyparty Affected: 0 , ≤ 1.20.24 (semver)
    cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-24 00:00
Credits
euriconicacio
Show details on NVD website
To clipboard 

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