CVE-2026-93320 BuildKit improperly handles special files in build snapshots
Attackers can trick BuildKit into accessing host devices or blocking operations via special file inodes, requiring a patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-93320?
CVE-2026-93320 is a medium-severity path traversal vulnerability in moby BuildKit, published on 5 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
Weakness: CWE-441
Which versions are affected by CVE-2026-93320?
How do I fix CVE-2026-93320?
No fix has been published for CVE-2026-93320 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-93320 being exploited?
There is no known exploitation of CVE-2026-93320 in the wild and no public exploit code.
Sources
Also known as AZL-106806, GHSA-9728-qjrv-2xh2, UBUNTU-CVE-2026-93320.