CVE-2026-112816

Improper certificate validation in the HTTPS listener in LXD

State: Published
Severity: 10.0 Critical
Published: Oct 30, 2026
Updated: Oct 31, 2026
Reserved: Oct 19, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	10.0 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	canonical

Weaknesses

CWE-295 Improper certificate validation

Affected Products

Product	Versions
LXDCanonical	4.0.14 to before 4.0.15Affected 5.0.10 to before 5.0.11Affected 5.21.8 to before 5.21.9Affected 6.9.0 to before 6.10.1Affected

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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