CVE-2026-63297
Critical · 9.9CVSS
9.9
EPSS
0.3%
Published
Aug 12, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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