Technical Questions

General

• Changing of sign-on provider for WebPros Account February 17, 2026
• How to copy backup settings and resume backups on a new device in Comet Backup
• Repeated lines in Comet Server system logs with: Error communicating with central server: failed remote telemetry submission: Unexpected HTTP response code: 500 body: Internal error
• Self Hosted Comet Server is shown as offline: FATAL: Couldn't validate license key (Licensing authority denied our request.). Server will shut down.

Security

• Vulnerability CVE-2026-31431: Copy Fail
• [CVE-2026-32999] RCE on Comet Server via branding configuration
• [CVE-2026-29200] Сritical IDOR vulnerability in Comet Backup

Storage Vaults & Storage Providers

• Comet Core server crashes on a server with only Storage Gateway or Cluster Manager roles
• Troubleshooting Storage Vault connection errors (wsarecv / Connection forcibly closed) in Comet Backup
• How to configure Windows Authenticode code-signing with Azure Key Vault?
• Connection to S3 Storage Vault fails: TLS handshake timeout
• How to migrate Storage Vault content to a new Storage Vault?
• How to remove unwanted backup data in Comet?
• See all 7 articles

Users and Groups Configuration

• Policy schedule is not applied to Default Protected Item at device registration ("All Storage Vaults" option) in Comet Backup
• Is it possible to add multiple admins and limit their privileges to read-only access in the Comet Management Console?

Backup and restore

• Job log reports the error: Couldn't decrypt Vault contents
• How to restore data or view contents from a deleted Protected Item or device in Comet Backup
• VSS Error during a backup in Comet Backup: Another shadow copy creation is already in progress. Wait a few moments and try again.
• Comet Backup agent fails to back up the home directories (/var/directory) of the system user on Linux
• Backup, reindex and deep scan jobs consistently fail with in Comet Backup during the retention pass: unexpected EOF
• Error during backup or retention pass: Out of memory error encountered. Temporary files are being used to reduce RAM consumption.
• See all 14 articles

Management console сonfiguration

• How to configure Cluster Manager

Installation & Upgrade

• Unable to Install Comet Backup Agent on Synology NAS (ARMv7 Architecture Error)
• Bulk Update does not report all jobs at successful
• How to apply backup agent hot-fixes?
• Installation of Comet Backup fails on DSM 7: Unexpected HTTP 403 accessing /healthcheck-localroot