How severe is CVE-2026-28384?

CVE-2026-28384 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28384?

CVE-2026-28384 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28384?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-28384 have an EU (EUVD) identifier?

Yes. CVE-2026-28384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11585.

When was CVE-2026-28384 published?

CVE-2026-28384 was published on 2026-03-12 and last updated on 2026-09-18.

CVE-2026-28384

CVE-2026-28384 is a critical-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
CVSS v4: 9.4
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11585
Weakness: CWE-78
Affected product: Canonical Lxd
Published: 2026-03-12
Last 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.

Frequently asked questions

What is CVE-2026-28384?: 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.
How severe is CVE-2026-28384?: CVE-2026-28384 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28384?: CVE-2026-28384 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28384?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-28384 have an EU (EUVD) identifier?: Yes. CVE-2026-28384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11585.
When was CVE-2026-28384 published?: CVE-2026-28384 was published on 2026-03-12 and last updated on 2026-09-18.

References

Affected products (1)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

More vulnerabilities in Canonical Lxd

CVE-2026-66897 — Critical (CVSS 9.9): A path traversal vulnerability in LXD's instance template processing allows an attacker with container edit…
CVE-2026-66898 — Critical (CVSS 9.9): A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and…
CVE-2026-63300 — Critical (CVSS 9.9): An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an…
CVE-2026-63299 — Critical (CVSS 9.9): An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume…
CVE-2026-63298 — Critical (CVSS 9.9): An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an…
CVE-2026-63297 — Critical (CVSS 9.9): An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated…

All CVEs affecting Canonical Lxd →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-100382 — Critical (CVSS 10.0): Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Wikimedia…
CVE-2026-77521 — Critical (CVSS 10.0): MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.5-lts, assistants with a tool, MCP tool,…
CVE-2026-82004 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
CVE-2026-76197 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
CVE-2026-76195 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS…
CVE-2026-19188 — Critical (CVSS 10.0): A critical OS command injection vulnerability has been identified in the Haiwell IoT Cloud HMI Gateway product. The…

Browse all CWE-78 (OS Command Injection) vulnerabilities →