Changes compared to 26.2.2
26.1.2 Iapetus released
Changes compared to 26.1.1
Enhancements
Safeguard against incorrect Proxmox port usage
Comet now detects users inadvertently entering the Proxmox Web UI port number (8006) for the Proxmox SSH port in the Proxmox PI.
Bug Fixes
- 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
26.2.2 ‘Voyager’ released
Changes compared to 26.2.1
New Features
- Added Storage Template replication as part of the Management Console replication
Enhancements
- Allow easily selecting groups of snapshots to search for restore or to delete in the Comet Management Console web interface
- Added a lock/unlock button to password and bucket ID fields to prevent password manager autofill
Bug Fixes
- 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 when proxmox restore fails if the backup is non-Proxmox VM and the target is RBD
- Fixed bug where a Proxmox tpmstate drive couldn't be read from rbd/ceph storage
26.2.1 ‘Voyager’ released
Changes compared to 26.2.0
Enhancements
- Include --skip-dump-date flag when calling external mysqldump agent for MYSQL backups to reduce unneeded data
- Added custom general-purpose metadata fields to the User Profile for use via the Comet Management Console API
- Detect user inadvertently entering the Proxmox Web UI port number (8006) for the Proxmox SSH port in the Proxmox PI
Bug Fixes
- 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
26.1.1 Iapetus released
Changes compared to 26.1.0
New Features
Proxmox Guest Quotas
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.

Enhancements
Proxmox 9.1 Support
Proxmox 9.1 introduced/store tpmstate disks (TPM-saved state) as qcow2 images and changed how TPM-backed guests are represented.
Comet now supports Proxmox 9.1. Tpmstate disks stored as qcow2 can be backed up and restored, and tpmstate backups are more reliable.
Bug Fixes
- 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
26.2.0 ‘Voyager’ released
Changes compared to 26.1.1
New Features
- New Czech language translation
Enhancements
- Add warning message if configuring a webhook integration over insecure HTTP in the Comet Core web interface
- Added internal mongodump functionality and removed support for the use of an external mongodump executable
- Added automatic redirect to new job's report page when triggered through webui
Bug Fixes
- Fixed an issue with clearing the "default" policy flag when multiple policy changes take place concurrently
- Fixed an issue with Comet Management Console recent activity page not showing deleted Protected Items
- Fixed an issue with excessive CRC error logs in case of reading from bad disk
- Fixed an issue with checkpoint deletion created by the backup process but exited due to a crash or unclean termination
- Fix an issue with unable to parse Proxmox storage names with upper-case letters
26.1.0 Iapetus released
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:
Changes compared to 25.8.2
New Features
Proxmox General Availability
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 restores to Ceph/RBD
Proxmox restores can now be performed to Ceph/RBD storage.
Proxmox backups and restores with non-root users
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.
Proxmox v9 support
The Proxmox Protected Item type now supports backing up Proxmox version 9.
SAS Relic codesigning
SAS Relic is now supported as a remote server for codesigning Windows clients.

Ukrainian translation
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.
Enhancements
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.
Tags for custom backup jobs
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
Visually See Offline Proxmox Nodes
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.
Changes compared to 25.9.11
Bug Fixes
- Fixed an issue with unable to parse Proxmox storage names with upper-case letters
- Fixed an issue where the Proxmox PI Web UI incorrectly rendered expand/collapse controls on leaf items
- Fixed an issue with displaying EBR volumes at the time of granular restore
- Fixed a cosmetic issue with outdated EULA text when installing the self-hosted Comet Core for Windows
25.9.11 Voyager released
Changes compared to 25.9.10
Enhancements
- The Comet Management Console web interface now allows creating Proxmox Protected Items to backup up all-of-cluster or all-of-node
- The Comet Management Console web interface now supports exclusions for Proxmox protected items
- Local root or Administrator permissions are now required to login/logout of the backup service
Bug Fixes
- Fixed an issue causing a VM's selection state to be incorrect after deselecting a disk from a fully selected VM
- Fixed an issue preventing the use of tenant storage templates in the 'Add User' dialog when adding a user on behalf of a tenant
- Fixed an issue causing an incorrect number of disk partitions to be reported as protected for some disk image Protected Items
- Fixed an issue causing ReFS volumes to fail to backup in some cases
- Fixed an issue with the Linux Disk Image Protected Item not correctly reporting errors that occurred when mounting ext4 snapshots
- Fixed a cosmetic issue causing incorrect text to be displayed during restore of disk image Protected Items
25.9.10 Voyager released
Changes compared to 25.9.9
Bug Fixes
- Fixed an issue causing unused disks to appear in the hardware UI after performing a Proxmox-to-Proxmox restore
- Fixed an issue causing request failures in Office 365 restore jobs
- Fixed an issue causing the web UI to appear unresponsive when a test connection runs
- Fixed an issue causing content read failures when retrieving data from OneDrive
- Fixed an issue causing request failures when performing a connection test with Office 365
- Fixed an issue with Comet Core's System Self-Backup schedule editor crashing when an existing schedule doesn't have a time zone
25.9.9 Voyager released
Changes compared to 25.9.9
Enhancements
- Updated the Storage Vault Retention tab to show only Storage Vaults associated with the current device
- Added more details to the job logs for Proxmox restore jobs
- Exposed warnings in the job log when allocating drives for Proxmox restore jobs
Bug Fixes
- Fixed an issue with the Proxmox Protected Item dialog in the Comet Management Console web interface rendering the Advanced tab multiple times when authentication was unsuccessful
- Fixed an issue with hardware configurations used during restoration of Windows environments from VMware/Hyper-V to Proxmox
- Fixed an issue causing connections to be blocked to Proxmox clusters with one or more nodes down
- Fixed a cosmetic issue rendering overflowing content unable to be scrolled in some areas of the Comet Management Console web interface