CVE-2026-28384

Authenticated RCE via unsanitized compression_algorithm

Severity Score

9.4

*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

Una sanitización inadecuada del parámetro compression_algorithm en Canonical LXD permite a un usuario autenticado y sin privilegios ejecutar comandos como el demonio LXD en el servidor LXD a través de llamadas a la API a los puntos finales de imagen y copia de seguridad. Este problema afectó a LXD desde la versión 4.12 hasta la 6.6 y fue solucionado en las versiones snap 5.0.6-e49d9f4 (canal 5.0/stable), 5.21.4-1374f39 (canal 5.21/stable) y 6.7-1f11451 (canal 6.0 stable). El canal 4.0/stable no está afectado ya que contiene la versión 4.0.10.

*Credits: N/A

CVSS Scores

Canonical Ltd.v4 9.4

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

Low

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2026-02-27 CVE Reserved
2026-03-12 CVE Published
2026-03-13 CVE Updated
2026-03-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CAPEC

CAPEC-88: OS Command Injection

References (5)

URL	Tag	Source
https://discourse.ubuntu.com/t/lxd-authenticated-remote-code-execution-fixes-available/78365	Media Coverage

URL	Date	SRC

URL	Date	SRC
https://github.com/canonical/lxd/commit/043696a13171ace7dd4c2b32d34ce039ab629052	2026-03-13
https://github.com/canonical/lxd/commit/7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9	2026-03-13
https://github.com/canonical/lxd/commit/b7b411caf5c4971bfe2386c72128f44d7e2aaf4f	2026-03-13

URL	Date	SRC
https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g	2026-03-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Canonical Search vendor "Canonical"		Lxd Search vendor "Canonical" for product "Lxd"				>= 6.0 < 6.7 Search vendor "Canonical" for product "Lxd" and version " >= 6.0 < 6.7"		en		Affected
Canonical Search vendor "Canonical"		Lxd Search vendor "Canonical" for product "Lxd"				>= 5.21.0 < 5.21.4 Search vendor "Canonical" for product "Lxd" and version " >= 5.21.0 < 5.21.4"		en		Affected
Canonical Search vendor "Canonical"		Lxd Search vendor "Canonical" for product "Lxd"				>= 5.0.0 < 5.0.6 Search vendor "Canonical" for product "Lxd" and version " >= 5.0.0 < 5.0.6"		en		Affected
Canonical Search vendor "Canonical"		Lxd Search vendor "Canonical" for product "Lxd"				4.12 Search vendor "Canonical" for product "Lxd" and version "4.12"		en		Affected