What’s Vulnerable › Vulnerabilities

CVE-2026-62941: Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-15
• Weakness: CWE-863

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.

Affected products

• lxc incus: before 7.3.0

References

• https://github.com/lxc/incus/security/advisories/GHSA-mq9x-prm8-3vpw
• https://github.com/lxc/incus/security/advisories/GHSA-mq9x-prm8-3vpw

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