Proxmox Virtual Environment: Schwachstelle ermöglicht Erlangen von Administratorrechten
WID-SEC-2026-3144 · first 02.09.2026 · updated 02.09.2026 · CVSS 9,8
What it is about
Proxmox Virtual Environment (PVE) ist eine Virtualisierungsplattform für Server. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Proxmox Virtual Environment ausnutzen, um Administratorrechte zu erlangen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- Proxmox Virtual Environment libpve-access-control <8.0.4
- Proxmox Virtual Environment 7.0-7.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Proxmox Virtual Environment libpve-access-control 8.0.4
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 Security Advisory vom 2026-09-01 forum.proxmox.com
- EU Vulnerability Database vom 2026-09-01 euvd.enisa.europa.eu
- Exploit + PoC nebusec.ai
CVE: CVE-2023-54391
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.