---
cve: "CVE-2026-34179"
severity: "CRITICAL"
cvss: 9.1
epss: "27%"
vendor: "Canonical"
kev: false
exploited: false
published: "2026-04-09 10:16:21"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T01:55:15+02:00"
---

# CVE-2026-34179

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 7b1f0b6acefa288398ead8dda48b046d7b2795a3 (Commit)
- c5184be310b13a8be5d9a5f286bfa1c0c286716e (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34179) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_