CVE-2026-63297
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/08/2026
Last modified:
13/08/2026
Description
An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Impact
Base Score 3.x
9.90
Severity 3.x
CRITICAL