Proxmox CVE

Incomplete privilege checks for cloudinit config changes

PSA-2026-00071-1 PVE

Affected packages

qemu-server

Details

An attacker with VM.Config.Network privileges on a VM could change cloud-init settings relating to authentication within the VM, which would otherwise require the VM.Config.Cloudinit privilege.

Note: normally, these settings only have an effect inside the VM on first boot, or after changing the instance-id.

This issue was privately reported by Project Loupe.

Fixed in

  • qemu-server >= 9.2.11

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