LXD 4.12-6.6 Improper sanitization of compression_algorithm allows exec
CVE-2026-28384 Published on March 12, 2026
Authenticated RCE via unsanitized compression_algorithm
An improper sanitization of the compression_algorithm parameter in Canonical LXD allows an authenticated, unprivileged user to execute commands as the LXD daemon on the LXD server via API calls to the image and backup endpoints. This issue affected LXD from 4.12 through 6.6 and was fixed in the snap versions 5.0.6-e49d9f4 (channel 5.0/stable), 5.21.4-1374f39 (channel 5.21/stable), and 6.7-1f11451 (channel 6.0 stable). The channel 4.0/stable is not affected as it contains version 4.0.10.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-28384 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2026-28384
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Affected Versions
Canonical lxd:- Version 6.0 and below 6.7 is affected.
- Version 5.21.0 and below 5.21.4 is affected.
- Version 5.0.0 and below 5.0.6 is affected.
- Version 4.12 is affected.