CVE-2026-33542

MEDIUM

Incus does not verify combined fingerprint when downloading images from simplestreams servers

Title source: cna
STIX 2.1

Description

Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.

References (1)

Scores

CVSS v3 4.8
EPSS 0.0004
EPSS Percentile 12.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-295
Status published
Products (3)
linuxcontainers/incus < 6.23.0
lxc/incus 0 - 6.23.0Go
lxc/incus < 6.23.0
Published Mar 26, 2026
Tracked Since Mar 27, 2026