PSA-2026-00062: Proxmox Backup Server: Missing privilege checks when configuring scheduled tape backup jobs
This Proxmox advisory covers a security issue in Proxmox Backup Server.
Key facts
- Fixed in
- proxmox-backup-server 4.2.7-1
- Advisory id
- PSA-2026-00062
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
A user with sufficient privileges to set up a tape backup job could reference any datastore or tape media pool/drive in the created job config. This issue was reported privately by Project Loupe.
Packages: proxmox-backup-server.
Text from the source record.
Fix and mitigation
Upgrade to a fixed release named by Proxmox:
- proxmox-backup-server 4.2.7-1
Vendor guidance
- Update to the fixed package versions: proxmox-backup-server >= 4.2.7-1.
End-of-life dates for Proxmox Backup Server
More Proxmox advisories
PSA-2026-00099Nov 10, 2026Proxmox: Incomplete validation of UPID when handling "stop task" API requestsPSA-2026-00087Nov 10, 2026Proxmox Backup Server: Missing privilege check in sync-job modificationPSA-2026-00086Nov 10, 2026Proxmox Backup Server: Missing protections against bogus snapshot creationPSA-2026-00061Oct 7, 2026Proxmox Backup Server: Missing validation of chunk sizes during pull syncPSA-2026-00060Oct 7, 2026Proxmox Backup Server: Missing privilege checks when removing namespace from prune jobPSA-2026-00059Oct 7, 2026Proxmox Backup Server: pxar/container restore target rootfs escape
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