CVE-2026-62941CWE-863broken-access-control

CVE-2026-62941

Critical · published August 21, 2026

CVSS v3.1
9.9
EPSS
0%
Percentile
37.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00443 · 37.5th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-08-21T19:16Z
References (2)
https://github.com/lxc/incus/security/advisories/GHSA-mq9x-prm8-3vpw · [email protected]https://github.com/lxc/incus/security/advisories/GHSA-mq9x-prm8-3vpw · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 21 AUG 14:47Z
    Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
    cvelistv5