CVE-2026-34179

CriticalCVSS 9.1/10Last modified Oct 26, 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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-915

Affected software

Vendor	Product	Versions
Canonical	lxd	>= 4.12.0, < 5.0.7; >= 5.1.0, < 5.21.5; >= 6.0.0, < 6.8.0

References

https://github.com/canonical/lxd/pull/17936Issue Tracking, Patch
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory

Timeline

Published: Apr 9, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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