CVE-2026-34179

critical · 9.1

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.

9.1

CVSS

0.3%

EPSS (exploit prob.)

20th

EPSS percentile

2026-04-09

Published

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

Weaknesses

CWE-915

Affected products

Vendor	Product	Affected versions
canonical	lxd	>= 4.12, <= 5.0.6
canonical	lxd	>= 5.21.0, <= 5.21.4
canonical	lxd	>= 6.0, <= 6.7

Check a specific version with /api/v1/cve/match.

References

https://github.com/canonical/lxd/pull/17936
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-34179