Proxmox Backup Server 4 End of Life Date
Proxmox Backup Server 4 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
Proxmox Backup Server 4 was released on August 6, 2025 and has no published end-of-life date yet. Its most recent patch is 4.2, published April 29, 2026.
What does Proxmox Backup Server 4 end of life mean?
When Proxmox Backup Server 4 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Proxmox Backup Server 4 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Proxmox Backup Server 4 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.