CVE-2026-112816

Improper certificate validation in the HTTPS listener in LXD

CRITICAL 10.0

CVSS 4.0Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HPublished: 2026-10-30 16:42 UTCUpdated: 2026-10-31 03:56 UTCAssigner: canonical

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.

CWE

CWE-295

Affected

Canonical LXD

References

https://github.com/canonical/lxd/security/advisories/GHSA-99jp-jwmc-65p4vendor-advisory
https://discourse.ubuntu.com/t/security-advisory-critical-vulnerability-found-in-canonical-lxd-and-microcloud/90557vendor-advisory
https://discourse.ubuntu.com/t/lxd-6-10-1-lts-has-been-released/90024release-notes
https://discourse.ubuntu.com/t/lxd-5-21-9-lts-has-been-released/90565/1release-notes
https://discourse.ubuntu.com/t/lxd-5-0-11-lts-has-been-released/90570/1release-notes
https://discourse.ubuntu.com/t/lxd-4-0-15-lts-has-been-released/90571release-notes

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