What is CVE-2026-33542?

CVE-2026-33542 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Improper Certificate Validation. CVSS score: 4.8/10. Published 2026-03-26.

How severe is CVE-2026-33542?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Linuxcontainers Incus

CVE-2026-33542

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…

Vulnerability class: Improper Certificate Validation

EPSS: 0.002 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Linuxcontainers Incus
Lxc Incus — versions < 6.23.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33542?: CVE-2026-33542 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Improper Certificate Validation. CVSS score: 4.8/10. Published 2026-03-26.
How severe is CVE-2026-33542?: Medium severity. CVSS v3 base score is 4.8 out of 10.