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CVE-2026-28384

Published: Mar 12, 2026

Modified: Mar 13, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
Canonical	lxd	affected `6.0 - < 6.7` affected `5.21.0 - < 5.21.4` affected `5.0.0 - < 5.0.6` affected `4.12`

Weaknesses (CWE)

References

https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g

vendor-advisory

https://github.com/canonical/lxd/commit/043696a13171ace7dd4c2b32d34ce039ab629052

patch

https://github.com/canonical/lxd/commit/7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9

patch

https://github.com/canonical/lxd/commit/b7b411caf5c4971bfe2386c72128f44d7e2aaf4f

patch

https://discourse.ubuntu.com/t/lxd-authenticated-remote-code-execution-fixes-available/78365

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