CVE-2026-34179 CRITICAL

CVE-2026-34179: Update of type field in restricted TLS certificate allows privilege escalation to cluster admin

Vendor Canonical
Product lxd
Weakness CWE-915
Published April 9, 2026
Last update April 9, 2026
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 9, 2026 Record updated