CVE-2026-62940 Incus has a project restriction bypass via instance migration config override
A restricted user can bypass project restrictions during instance migration to gain privileged container access and escape to the host.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-62940?
CVE-2026-62940 is a critical vulnerability in lxc incus, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incus is a system container and virtual machine manager. Prior to version 7.3.0, when migrating an instance to another cluster member, user-supplied configuration overrides (including security-critical keys like `security.privileged` and `raw.lxc`) are applied without any project restriction enforcement, allowing a restricted project user to escalate to a privileged container and escape to the host. Version 7.3.0 patches the issue.
Weakness: CWE-862
Which versions are affected by CVE-2026-62940?
How do I fix CVE-2026-62940?
Upgrade to a fixed version.
Is CVE-2026-62940 being exploited?
There is no known exploitation of CVE-2026-62940 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-62940, GHSA-qw5c-v953-38gw, UBUNTU-CVE-2026-62940.