Varnish Controller 7.5.1 Release

• Added aarch64 (ARM) packages for Varnish Controller components.
• Added Ubuntu 26.04 (Resolute Raccoon) packages for Varnish Controller components.
• Fixed URL matching in the root VCL when the request includes a port, now includes a new variable baseURLNoPort.
• Fixed router deployment bug that could clear domains when multiple VCLGroups with different domains used the same routing rules.
• Fixed agent backups to include the common VCL directory so backups can be restored correctly.
• Fixed a bug where unrelated commits in a shared git repository would trigger a redeploy of a VCLGroup.
• Fixed vcli to fail properly when VCL compilation fails during deploy.
• Fixed session login and impersonation issues when creating session tokens.
• Removed the GET-method requirement on the JSON health check response (traffic_router_health.vcl), and reload the root VCL when the generated health check VCL changes.
• Prevented creation of a new rolling upgrade for a VCLGroup that already has an active one.
• Prevented adding an already-deployed domain to multiple VCLGroups on the same agent, and prevented removing all domains from a deployed VCLGroup.
• Reduced memory usage of the system debug and monitoring endpoints.
• Reduced database load with covering indexes and several optimizations.
• Improved ACME DNS propagation checks with clearer error messages and more reliable lookups.
• Security hardening across the API gateway and traffic router, covering request and server timeouts, internal cache bounds, and proxy header / TLS SNI / HTTP Host validation.
• Version mismatches between components are now logged at WARN level for better operational visibility.
• Updated dependencies (Lego, PGX) to address upstream security advisories.
• UI: Added a Server Deployments view per VCLGroup with live status polling and per-server deployment status. The VCLGroup header and list now show a warning when only some matching servers have deployed the latest configuration.
• UI: Read-only agents are now marked Unavailable in the VCLGroup matching-servers picker in the UI.
• UI: The Deploy & Compile file list now shows an indicator when a deployed file version is older than the latest available version.

See Varnish Controller Changelog for more details on the changes and the upgrade notes for more details on how to upgrade.