CVE-2026-10031 SFTPGo < 2.7.4 Permission Bypass via Symbolic Link Creation
Authenticated users can bypass directory access controls via symbolic links to read or modify restricted files in SFTPGo.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10031?
CVE-2026-10031 is a medium-severity missing authorization vulnerability in drakkan SFTPGo, published on 30 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-10031?
How do I fix CVE-2026-10031?
No fix has been published for CVE-2026-10031 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-10031 being exploited?
There is no known exploitation of CVE-2026-10031 in the wild and no public exploit code.
Sources
Also known as GHSA-3964-29ff-vwff, GHSA-fj9v-mxr3-w75w.