Authorization Bypass in LXD Affects Canonical Products
CVE-2026-63296

9.9CRITICAL

Key Information:

Vendor

Canonical

Status
Lxd
Vendor
CVE Published:
12 August 2026

What is CVE-2026-63296?

An authorization bypass flaw in LXD allows authenticated attackers to circumvent project restrictions during instance migration. When an instance is moved to a target project, LXD improperly accepts configuration overrides without validating them against the project's enforced restrictions. This vulnerability allows attackers to exploit the issue, enabling the migration of instances with high-privilege configurations into restricted projects while evading security controls.

Affected Version(s)

LXD Linux 5.0.0 < 5.0.8

LXD Linux 5.21.0 < 5.21.6

LXD Linux 6.0 < 6.10

References

https://github.com/canonical/lxd/security/advisories/GHSA...
vdb-entryvendor-advisory

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.