What’s Vulnerable › Vulnerabilities
CVE-2026-33542: Incus does not verify combined fingerprint when downloading images from simplestreams servers
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-03-26 · updated 2026-06-17
- Weakness: CWE-295
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.
Affected products
- lxc incus: before 6.23.0 — fixed in 6.23.0
How to fix
Upgrade to a fixed version: lxc incus 6.23.0. Check the vendor advisory for mitigations.
References
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