The Gradient PSA integration has been retired. Existing configurations are preserved and clearly marked as deprecated in the UI, with a startup warning to help administrators plan any necessary migration.
Proxmox customers can now protect their VM and LXC templates — with full backup and restore support. This closes a meaningful gap in Proxmox coverage, ensuring the building blocks of an environment can be recovered just as reliably as live workloads.
Zero-touch device registration for 2FA-enabled users
Administrators can now register devices on behalf of users who have 2FA enabled, using either lobby mode or an install token, without requiring the user to be present or share their TOTP code. This removes a key friction point in enterprise and MSP deployments, enabling true zero-touch device provisioning.
Customers running Ubuntu 25 can now take full disk image backups, keeping pace with the latest release cycle.
Auto-add Cluster Manager target when creating Storage Templates
When setting up a Storage Template or replication target, administrators are now prompted to simultaneously register the destination as a Cluster Manager target — eliminating a common multi-step setup gap.
Streamlined licensing during Comet Core installation
The Comet Core installer now presents a streamlined licensing experience showing only the serial license key option.
/run and /var/run excluded from Unix Files and Folders backups by default
Files and Folders backups on Unix systems now automatically exclude /run and /var/run by default. Excluding these paths out-of-the-box improves efficiency and reduces unnecessary data capture without any user configuration.
Improved error messaging for Backblaze Storage Vault creation failures
When a Backblaze-backed Storage Vault fails to be created, users now receive a clear, actionable error message instead of a generic server error — reducing troubleshooting time and support overhead.
Fixed an issue clearing the "default" policy flag when multiple policy changes take place concurrently
Fixed an issue where Comet Core would fail to start if the Storage Gateway failed to validate the storage buckets
Fixed an issue where, when logged in as a top-level admin, the User Details page in the Comet Management Console displayed policies from other tenants in the policy dropdown
Fixed an issue with generating MSI files if the branding name contained unsupported characters
Fixed an issue with the 'login as user' feature if Tenants are being used
Fixed an issue with the Associated Devices table when viewing a Storage Vault in the Comet Management Console web interface
Fixed an issue where a Proxmox tpmstate drive couldn't be read from rbd/ceph storage
Fixed an issue when proxmox restore fails if the backup is non-Proxmox VM and the target is RBD
Fixed an issue with logging in to the Comet Backup desktop app from inside the Windows-based Recovery Media
Fixed an issue with eager refreshing of the login dialog in the Comet Backup desktop app causing fields to be cleared before use
Storage Vault ModifyTime is now updated when edited in the Comet Management Console
Fixed an issue where Comet Core would fail to start if the Storage Gateway failed to validate the storage buckets
Fixed an issue where, when logged in as a top-level admin, the User Details page in the Comet Management Console displayed policies from other tenants in the policy dropdown
Fixed an issue when requesting an Impossible Cloud (Partner API) Storage Vault where the request body was empty
Fixed an issue when requesting an Impossible Cloud (Partner API) (Object Lock) Storage Vault where object lock days defaulted to 0. Impossible Cloud requires object lock days of > 0
Fixed an issue on the Comet Management Console where the test connection button would fail for Impossible Cloud (Partner API)
Fixed an issue with generating MSI files if the branding name contained unsupported characters
Hid empty menu items on the Comet Management Console restore dialog snapshot selector. This is now the same as on the Comet Backup desktop app
Comet Admins can now set per-user quotas that limit how many Proxmox VMs and LXC containers a Comet User may protect. Quotas are enforced via the UI and API and will block and log attempts that would exceed the configured limit.
Fixed an issue where Proxmox to Proxmox restore does not have correct boot order
Fixed an issue causing misleading warnings during normal SSH tunnel shutdown for Proxmox tasks
Fixed an issue with EFI disks being created incorrectly during Proxmox restore
Fixed an issue with the Comet Backup desktop app where changing a Protected Item type from Proxmox to another type would cause the application to crash
Fixed an issue with Proxmox node connections where SSH accepts connections on ports other than 22
Fixed an issue preventing Comet Backup from installing on Synology DSM
Iapetus is the latest entry in our quarterly rollup series. It branches off from our main rolling Voyager development into a fixed target for our partners to qualify and build upon.
This Quarterly release is named after Saturn's moon Iapetus. Fun fact: Iapetus, Saturn's third-largest moon, is the only large moon in the Solar System with a two-tone coloration - one hemisphere bright as snow and the other dark as coal. This dramatic contrast makes it the most distinctive moon orbiting Saturn, with one side ten times brighter than the other, giving it a striking yin-yang appearance from space.
Comet 26.1.0 Iapetus, our latest Quarterly release, marks an important milestone as our Proxmox VE Protected Item graduates from Beta to General Availability. This release also includes numerous enhancements to performance, reliability, and platform support.
As always for a new quarterly release, there are two changelogs for 26.1.0 depending on whether you are coming from the previous quarterly release or the previous Voyager release:
With Comet 26.1.0 Iapetus, our Proxmox VE Protected Item has graduated from Beta to General Availability and is production-ready.
Proxmox Virtual Environment is a complete, open-source server management platform for virtualization. It tightly integrates the KVM hypervisor, Linux Containers (LXC), software-defined storage, and networking functionality on a single platform. With the integrated web-based user interface you can manage VMs, containers and high availability for clusters.
Proxmox backups and restores can now be run using a correctly configured non-root user.
Changed block tracking for Proxmox protected items
Changed block tracking (CBT) is now supported for Proxmox Protected Items, allowing for significantly reduced job times when backing up low-churn datasets.
Comet now features a Ukrainian (Українська мова) language translation.
Option to enable user home directory sandboxing on Linux
Linux users now have the option to enable sandboxing of user home directories, with Comet backing up each home directory data as the owner of that directory and thus ensuring that permissions and ACLs are fully respected.
Support shared quotas across multiple Storage Vaults
Comet 25.9.7 brings initial support for sharing quotas between multiple Storage Vaults, allowing for more flexible storage offerings.
Added support for the new Wasabi US West 2 (San Jose) region
In Comet 25.9.2, Wasabi users can now configure buckets for Wasabi's new US West 2 (San Jose) region.
Improved the performance of Comet user APIs, particularly when the server is under load
Comet 25.9.5 brings substantial under-the-hood improvements to the performance of APIs used in regular activities, reducing load on busy servers and increasing throughput of short-lived backup jobs.
Support for running multiple commands in a Program Output Protected Item
Multiple streams of program output can now be combined into a single program output Protected Item, each with an assigned file name to be used upon restore, allowing for related sets of data to be configured and scheduled in unison.
Custom backup jobs started via the API can now have tags specified, allowing these jobs to be identified and retrieved by tag through the job history search in the Management Console and through the API.
Added APIs to get, update and delete Protected Items
API users can now get, update, and delete Protected Items in isolation, without having to interact with the rest of the user profile.
Configure Proxmox Changed Block Tracking in Comet Backup Desktop App
Changed Block Tracking can now be selected for Proxmox backups via the Comet Backup desktop app
The Proxmox Protected Item now displays offline nodes with clear visual indicator in the items window. This improvements makes it significantly easier to understand the status of nodes in your Proxmox Cluster.
