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

CVE-2026-34179

Update of type field in restricted TLS certificate allows privilege escalation to cluster admin PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Canonical / lxd	affected 4.12.0 before 5.0.7; affected 5.1.0 before 5.21.5; affected 6.0.0 before 6.8.0

CWE

CWE-915

References

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

ADP enrichment

CISA-ADP

No English description supplied.

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