Missing Authorization Checks in Incus System Container and VM Manager
CVE-2026-55621

7.7HIGH

Key Information:

Vendor

Lxc

Status
Incus
Vendor
CVE Published:
21 August 2026

What is CVE-2026-55621?

Incus, a system container and virtual machine manager, has a vulnerability that allows an unauthorized user to copy custom volumes from projects they do not have access to, given they know the project's name and the custom volume's name. This flaw enables potential exposure of sensitive data contained in custom volumes, highlighting the importance of implementing proper authorization mechanisms. Users are strongly advised to upgrade to version 7.2.0 or later to mitigate this risk.

Affected Version(s)

incus < 7.2.0

References

https://github.com/lxc/incus/security/advisories/GHSA-64f...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.