Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-34179

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
09/04/2026
Last modified:
22/04/2026

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.10 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.10
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* 4.12 (including) 5.0.6 (including)
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* 5.21.0 (including) 5.21.4 (including)
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* 6.0 (including) 6.7 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools