Critical severity · published Mar 12, 2026
CVE-2026-28384
Authenticated RCE via unsanitized compression_algorithm
9.9
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LX
lxd · Canonical
6.0 before 6.7; 5.21.0 before 5.21.4; 5.0.0 before 5.0.6; 4.12 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28384
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28384
Issue Tracking
https://discourse.ubuntu.com/t/lxd-authenticated-remote-code-execution-fixes-available/78365
Patch
https://github.com/canonical/lxd/commit/043696a13171ace7dd4c2b32d34ce039ab629052
Patch
https://github.com/canonical/lxd/commit/7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9
Patch
https://github.com/canonical/lxd/commit/b7b411caf5c4971bfe2386c72128f44d7e2aaf4f
Vendor Advisory
https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g
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