CVE-2026-33542CWE-295

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

Medium · published March 26, 2026

CVSS v4.0
5.7
EPSS
0%
Percentile
8.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.7 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:P
EPSS
0.00196 · 8.8th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-03-26T22:32Z
EPSS history
Timeline
  • 26 MAR 22:32Z
    Incus does not verify combined fingerprint when downloading images from simplestreams servers
    cvelistv5