The whole Proxmox 8 era ends August 31 —
VE, Backup Server, and Mail Gateway together.
Three Proxmox products reach end of life on August 31, 2026 — the same day. Proxmox VE 8, Proxmox Backup Server 3, and Proxmox Mail Gateway 8 all stop receiving security updates together, because all three ride the same clock: Debian 12. Most deadline coverage — including our own VE 8 piece — focuses on the hypervisor. This one is about the part that gets missed: the backup server protecting those VMs and the mail gateway in front of the domain die the same day, and the fleet audit that only checked VE is two products short.
Lockstep is the policy, not a coincidence
Proxmox’s own FAQ states the rule: each release is supported at least as long as its Debian base is maintained by the Debian Security Team. Its support table row for VE 8 reads Debian 12 (Bookworm), released 2023-06, security support to 2026-08. Because every product in a Proxmox generation is built on the same Debian release, the whole generation retires together — and it has now happened three times:
| Generation | Debian base | VE | Backup Server | Mail Gateway | Family EOL |
|---|---|---|---|---|---|
| 8-era | Debian 12 | 8 | 3 | 8 | 2026-08-31 |
| 7-era | Debian 11 | 7 | 2 | 7 | 2024-07-31 |
| 6-era | Debian 10 | 6 | 1* | 6 | 2022-09-30 |
*Backup Server 1 shipped mid-generation (November 2020) and retired with the 6-era.
Debian 12 itself left Debian Security Team coverage on July 11, 2026; Proxmox’s own updates carry the 8-era one further month. If you run Proxmox alongside plain Debian 12 hosts, note the asymmetry: Debian offers LTS beyond that date — Proxmox offers no extended support at all. August 31 is the end, at any price.
What runs out, and where it bites
The current scores tell the story of a deadline two weeks out: all three 8-era products sit at 25 for VE 8, 25 for Backup Server 3, and 25 for Mail Gateway 8 — moderate today, and rising permanently the day the patches stop. Their successors score 10 across the board.
Think about which of the three actually holds the crown jewels. The hypervisor gets the attention, but Backup Server holds the copies of everything — an unpatched backup target is precisely what ransomware operators hunt first — and Mail Gateway sits on the internet by definition. The two products least likely to be on the upgrade list are the two with the worst post-EOL exposure profile.
The upgrade order that avoids a bad weekend
All three upgrade in place to the Debian 13 (Trixie) generation: VE 8 → 9, Backup Server 3 → 4, Mail Gateway 8 → 9. Two sequencing notes from the field: upgrade Backup Server first or together with VE — newer PBS versions back up older PVE nodes happily, and you want a current, patched backup chain before touching hypervisors; and treat the VE upgrade as the pve8to9 checklist project it is, not an apt dist-upgrade on a Friday.
Every Proxmox product’s dates and EOL Risk Scores are on the VE, Backup Server, and Mail Gateway lifecycle pages, updated at every build from upstream data.
Frequently Asked Questions
Which Proxmox products reach end of life on August 31, 2026?
Three at once: Proxmox VE 8, Proxmox Backup Server 3, and Proxmox Mail Gateway 8 all reach end of life on August 31, 2026. They share the date because all three are built on Debian 12 (Bookworm), and Proxmox supports each release at least as long as its Debian base has Debian Security Team coverage.
Why do all Proxmox products die on the same day?
Each Proxmox generation is built on one Debian release, and support follows the Debian base. The pattern is consistent across three generations now: the 7-era products (VE 7, Backup Server 2, Mail Gateway 7) all ended on July 31, 2024, the 6-era on September 30, 2022, and the 8-era ends together on August 31, 2026.
What are the upgrade paths off the Proxmox 8 era?
In-place upgrades to the current generation: Proxmox VE 8 to VE 9, Backup Server 3 to 4, and Mail Gateway 8 to 9 — all Debian 13 (Trixie) based. Upgrade Backup Server before or together with VE: a newer PBS can back up older PVE nodes, but you want both current before the August 31 cutoff.
Is there extended support for Proxmox VE 8 after end of life?
Proxmox offers no extended-support program for EOL releases — after August 31, 2026 there are no further updates for the 8-era at any price. The upgrade to the 9/4-era is the only supported path, which is why the same-day family cutoff deserves a project, not a ticket.