Critical severity · published Aug 21, 2026
CVE-2026-62941
Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
9.9
CVSS
0.4%
EPSS
No
On KEV
Description
Incus is a system container and virtual machine manager. Prior to version 7.3.0, when copying an instance across projects, the project restriction check (`AllowInstanceCreation`) runs BEFORE the source instance's configuration is merged into the request. Dangerous configuration keys (including `security.privileged`, `raw.lxc`, `raw.apparmor`) from the source instance are merged AFTER the check passes, bypassing all project restrictions on the target project. Version 7.3.0 patches the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
incus · lxc
< 7.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-62941
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-62941
github.com
https://github.com/lxc/incus/security/advisories/GHSA-mq9x-prm8-3vpw
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