CVE-2026-33743 MEDIUM

CVE-2026-33743: Incus vulnerable to denial of source through crafted bucket backup file

Vendor Lxc
Product incus
Weakness CWE-770 · Uncontrolled resource consumption
Published March 26, 2026
Last update March 27, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Incus is a system container and virtual machine manager. Prior to version 6.23.0, a specially crafted storage bucket backup can be used by an user with access to Incus' storage bucket feature to crash the Incus daemon. Repeated use of this attack can be used to keep the server offline causing a denial of service of the control plane API. This does not impact any running workload, existing containers and virtual machines will keep operating. Version 6.23.0 fixes the issue.

Key dates

02Disclosure timeline

March 26, 2026 CVE published
March 27, 2026 Record updated