Vulnerability · Published Aug 12, 2026 · Assigned by canonical
CVE-2026-63296Project restriction bypass via instance migration config override
Critical 9.9
In plain English
A critical-severity incorrect authorization in LXD from Canonical. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Official description
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | lxd | no fix listed | DEBIAN-CVE-2026-63296 |
| Debian:13 | lxd | no fix listed | DEBIAN-CVE-2026-63296 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/canonical/lxd/security/advisories/GHSA-gcr9-5q6r-w625 vdb-entry, vendor-advisory