CVE-2026-28384
High
High exploit probability or critical severity with a known exploit.
CVSS base
9.9
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.7%
49.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-78
Published 2026-03-12 · modified 2026-09-18
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.
Affected
References
- exploit https://discourse.ubuntu.com/t/lxd-authenticated-remote-code-execution-fixes-available/78365
- https://github.com/canonical/lxd/commit/043696a13171ace7dd4c2b32d34ce039ab629052
- https://github.com/canonical/lxd/commit/7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9
- https://github.com/canonical/lxd/commit/b7b411caf5c4971bfe2386c72128f44d7e2aaf4f
- exploit https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g
- exploit https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g