CVE-2026-112816
Critical
Description
Improper certificate validation in the HTTPS listener in Canonical LXD 4.0.14, 5.0.10, 5.21.8, 6.9 before 4.0.15, 5.0.11, 5.21.9, 6.10.1 allows an unauthenticated attacker to authenticate as any trusted client and gain full access to the cluster and managed virtual machines via a crafted certificate chain.
SeverityCritical
CVSS10.0
Exploit probability—
ProductLXD
PublishedOct 30, 2026
First seenNov 4, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- Canonical LXD4.0.15, 5.0.11, 5.21.9, 6.10.1 or later
Vendor advisories
- github.com/canonical/lxd/security/advisories/GHSA-99jp-jwmc-65p4
- discourse.ubuntu.com/t/security-advisory-critical-vulnerability-found-in-canonical-lxd-and-microcloud/90557
- discourse.ubuntu.com/t/lxd-6-10-1-lts-has-been-released/90024
- discourse.ubuntu.com/t/lxd-5-21-9-lts-has-been-released/90565/1
- discourse.ubuntu.com/t/lxd-5-0-11-lts-has-been-released/90570/1
- discourse.ubuntu.com/t/lxd-4-0-15-lts-has-been-released/90571
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Canonical LXD | 4.0.14 ≤ v < 4.0.15, 5.0.10 ≤ v < 5.0.11, 5.21.8 ≤ v < 5.21.9, 6.9.0 ≤ v < 6.10.1 | 4.0.15, 5.0.11, 5.21.9, 6.10.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.