CVE-2026-112816 Canonical LXD - Authentication Bypass

Canonical LXD < 4.0.15, < 5.0.11, < 5.21.9, < 6.10.1 contains an authentication bypass caused by improper certificate validation in the HTTPS listener, letting unauthenticated attackers authenticate as any trusted client and gain full cluster access, exploit requires crafted certificate chain.

CVSS base score 10.0 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
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
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-295

Vendor fix

Update to versions 4.0.15, 5.0.11, 5.21.9, 6.10.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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