CVE-2026-34179

In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/canonical/lxd/pull/17936	Issue Tracking Patch
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5	Exploit Third Party Advisory
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:canonical:lxd::::::::
	cpe:2.3:a:canonical:lxd::::::::
	cpe:2.3:a:canonical:lxd::::::::

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En las versiones 4.12 a 6.7 de Canonical LXD, la función doCertificateUpdate en lxd/certificates.go no valida el campo Type al manejar solicitudes PUT/PATCH a /1.0/certificates/{fingerprint} para usuarios de certificados TLS restringidos, permitiendo a un atacante remoto autenticado escalar privilegios a administrador de clúster.

Information

Published : 2026-04-09 10:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-34179

Mitre link : CVE-2026-34179

CVE.ORG link : CVE-2026-34179

JSON object : View

Products Affected

canonical

lxd

CWE

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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