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CVE-2026-63294

Canonical Lxd remote code execution

9.9 CRITICALPublic exploitEPSS 0.88%
  1. Published12 Aug 2026

Description

A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Canonical Lxd≥ 4.0.0 < 4.0.12 · ≥ 5.0.0 < 5.0.8 · ≥ 5.1 < 5.21.6 · ≥ 6.0 < 6.10

Remediation

Fixed in
Canonical Lxd≥ 4.0.12

References

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Frequently asked

Is CVE-2026-63294 being actively exploited?

CVE-2026-63294 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.88%.

How severe is CVE-2026-63294?

CVE-2026-63294 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 0.88% probability of exploitation.

Which products are affected by CVE-2026-63294?

Affected products include Canonical Lxd.

How do I fix CVE-2026-63294?

Upgrade affected software to a fixed version, for example Canonical Lxd 4.0.12 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-63294 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.