CVE-2026-10031: Incorrect Authorization in drakkan SFTPGo
SFTPGo prior to 2.7.4 contains a permission bypass vulnerability that allows authenticated users to circumvent per-directory access controls by creating symbolic links in a permitted directory that point to files in directories where download, upload, or overwrite permissions are denied. Attackers can exploit the create_symlinks permission combined with read and write access in one directory to read or modify files in restricted directories, as operations are authorized against the link's directory permissions rather than the dereferenced target's directory permissions.
AI Analysis
Technical Summary
CVE-2026-10031 describes a permission bypass vulnerability in drakkan SFTPGo before version 2.7.4. Authenticated users who have the create_symlinks permission and read/write access in one directory can create symbolic links pointing to files in restricted directories. Because the authorization checks are applied to the directory containing the symbolic link rather than the directory of the target file, users can read or modify files in directories where they should not have download, upload, or overwrite permissions.
Potential Impact
The vulnerability allows authenticated users with limited permissions to bypass per-directory access controls, potentially leading to unauthorized reading or modification of files in restricted directories. The CVSS 4.0 score is low (2.3), reflecting that exploitation requires authenticated access and high attack complexity, with limited impact scope.
Mitigation Recommendations
A fixed version 2.7.4 of SFTPGo is available that addresses this vulnerability. Users should upgrade to version 2.7.4 or later to remediate this issue. No other mitigation guidance is provided.
CVE-2026-10031: Incorrect Authorization in drakkan SFTPGo
Description
SFTPGo prior to 2.7.4 contains a permission bypass vulnerability that allows authenticated users to circumvent per-directory access controls by creating symbolic links in a permitted directory that point to files in directories where download, upload, or overwrite permissions are denied. Attackers can exploit the create_symlinks permission combined with read and write access in one directory to read or modify files in restricted directories, as operations are authorized against the link's directory permissions rather than the dereferenced target's directory permissions.
CVSS v4.0
Score 2.3low
Affected software
drakkan
SFTPGo
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-10031 describes a permission bypass vulnerability in drakkan SFTPGo before version 2.7.4. Authenticated users who have the create_symlinks permission and read/write access in one directory can create symbolic links pointing to files in restricted directories. Because the authorization checks are applied to the directory containing the symbolic link rather than the directory of the target file, users can read or modify files in directories where they should not have download, upload, or overwrite permissions.
Potential Impact
The vulnerability allows authenticated users with limited permissions to bypass per-directory access controls, potentially leading to unauthorized reading or modification of files in restricted directories. The CVSS 4.0 score is low (2.3), reflecting that exploitation requires authenticated access and high attack complexity, with limited impact scope.
Mitigation Recommendations
A fixed version 2.7.4 of SFTPGo is available that addresses this vulnerability. Users should upgrade to version 2.7.4 or later to remediate this issue. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-05-28T18:37:02.626Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a6bdccd9c2644c7f8d9d027
Added to database: 07/30/2026, 23:22:53 UTC
Last enriched: 08/15/2026, 13:43:19 UTC
Last updated: 09/13/2026, 22:01:31 UTC
Views: 71
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