Proxmox CVE

Missing privilege checks for local sync jobs

PSA-2026-00057-1 PBS

Affected packages

proxmox-backup-server

Details

An attacker with highly privileged access to one datastore + namespace could set up a "local" sync job pulling from arbitrary datastores.

This issue was discovered internally and independently by Project Loupe.

Fixed in

  • proxmox-backup-server >= 4.2.8-1

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