Improper certificate validation in the HTTPS listener in LXD

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-112816
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 17:17:14 UTC
Updated2026-10-31 04:18:16 UTC
DescriptionImproper 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.

Risk And Classification

Primary CVSS: v4.0 10 CRITICAL from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-295 | CWE-295 CWE-295 Improper certificate validation

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary10CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/C...
4.0CNACVSS10CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical LXD affected 4.0.14 4.0.15 semver Linux
CNA Canonical LXD affected 5.0.10 5.0.11 semver Linux
CNA Canonical LXD affected 5.21.8 5.21.9 semver Linux
CNA Canonical LXD affected 6.9.0 6.10.1 semver Linux

References

ReferenceSourceLinkTags
github.com/canonical/lxd/security/advisories/GHSA-99jp-jwmc-65p4 [email protected] github.com
discourse.ubuntu.com/t/security-advisory-critical-vulnerability-found-in-canonical... [email protected] discourse.ubuntu.com
discourse.ubuntu.com/t/lxd-6-10-1-lts-has-been-released/90024 [email protected] discourse.ubuntu.com
discourse.ubuntu.com/t/lxd-4-0-15-lts-has-been-released/90571 [email protected] discourse.ubuntu.com
discourse.ubuntu.com/t/lxd-5-21-9-lts-has-been-released/90565/1 [email protected] discourse.ubuntu.com
discourse.ubuntu.com/t/lxd-5-0-11-lts-has-been-released/90570/1 [email protected] discourse.ubuntu.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Stéphane Graber (en)

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