Proxmox Virtual Environment: Mehrere Schwachstellen
WID-SEC-2026-1266 · first 24.04.2026 · updated 22.07.2026 · CVSS 7,2
What it is about
Proxmox Virtual Environment (PVE) ist eine Virtualisierungsplattform für Server. Ein Angreifer kann mehrere Schwachstellen in Proxmox Virtual Environment ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um einen Cross-Site Scripting Angriff durchzuführen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen
- Informationen offenzulegen
- einen Cross-Site Scripting Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Proxmox Virtual Environment
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Install the updates provided by the vendor; details in the sources below.
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Proxmox Virtual Environment Security Advisories vom 2026-04-23 forum.proxmox.com
- Proxmox Virtual Environment Security Advisories vom 2026-04-23 forum.proxmox.com
- Proxmox Virtual Environment Security Advisories vom 2026-04-23 forum.proxmox.com
- Proxmox Virtual Environment Security Advisories vom 2026-04-23 forum.proxmox.com
- Proxmox Virtual Environment Security Advisories vom 2026-04-23 forum.proxmox.com
CVE: CVE-2026-51081, CVE-2026-51082, CVE-2026-51083
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.