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What's new in Kasm 1.18.1

warning

For long-running systems: this release requires a minimum Docker version of v25.0.5. If necessary prior to Kasm upgrade, please upgrade Docker following their instructions for your distribution. A detailed explanation and instructions are available in the Kasm support article.

info

This installation will reference the 1.18.0 Workspace registry images by default.

Features​

  • Deprecations
    • The installation and upgrade scripts now require a minimum Docker version of v25.0.5 and a minimum Docker Compose version of v2.40.2.

Bugfixes​

  • Fixed issue related to passing multiple smart card readers into Kasm Workspaces.
  • Fixed a bug which caused the Guacamole connection proxy to stop sending logs to the database after a service token refresh.
  • Applied a Guacamole change that improves error communication during user connection creation.
  • Fixed bug that prevented defining custom docker container labels via Docker Run Config Override.
  • Added fix to ensure that a slow database log rotation or kasm update check on the manager does not result in the manager not responding to API requests.

Rolling Bug Fixes​

The following fixes have been made in the rolling tagged versions of the Kasm Workspaces container images.

  • Kasm Workspace Images

    • (12/05/2025) Updated KasmVNC to 1.4.1, fixing server-side enforced idle session timeout.
    • (04/20/2026) Added an optional wrapper for bwrap in Kali Rolling Desktop and Trace Labs images to prevent the black screen issue for high-privilege sessions. See the KB article for more info.
    • (06/05/2026) Fixed an issue where session recording was not working with the KasmOS image.
    • (08/01/2026) Added Ollama to AnythingLLM to support the built in AnythingLLM model engine for local AI use cases.
    • (08/01/2026) Fixed an issue with the v4l2loopback module where it would fail to build on kernel version 7.
    • (09/11/2026) Fixed an issued where audio was not working with Alpine Workspace Images.

  • Kasm Service Images

    • Security Fixes
    • (10/26/2025) Added fix to ensure that a slow database log rotation or kasm update check on the manager does not result in the manager not responding to API requests.
    • (10/26/2025) Added logic to ensure that database log rotation and kasm update check does not run on multiple managers in multi-zone deployments.
    • (12/26/2025) Fixed a bug that prevented connection proxy token refresh when "API Token Refresh Leeway" was set to a very high value.
    • (12/26/2025) Fixed a bug that marked connection proxy tokens as consumed even when an error prevented token refresh.
    • (01/15/2026) Fixed Guacamole seamless clipboard overwriting by handling clipboard streams correctly.
    • (01/15/2025) Fixed a bug that prevented KasmVNC connections from working in Kubernetes deployments.
    • (01/22/2025) Fixed issue of Server Sessions remaining stuck at deleting state by implementing a safe retry logic in manager.
    • (02/19/2026) Fixed issue where clipboard-up content was truncated at 10 KB.
    • (02/09/2026) Fixed deadlock exception during agent heartbeat caused by conflicting updates to server_image_slots table.
    • (02/25/2026) Fixed unhandled exception when disabling storage mappings.
    • (03/05/2026) Fixed issue where VM creation would fail on Harvester 1.7 due to missing limits spec.
    • (03/12/2026) Fixed issue where servers with utf8 credentials could cause workspace launch failures.
    • (02/18/2026) Fixed issue where the RDP HTTPS Gateway would send keepalives for sessions it was not associated with
    • (02/05/2026) Fixed PostgreSQL password parsing issues involving special characters.
    • (03/17/2026) Web manifest changed to use absolute URLs rather than relative ones as Chrome appeared to get lost occasionally.
    • (03/17/2026) Fixed performance degradation when using the get_users public API with large user datasets.
    • (03/18/2026) Fixed issue where usernames were injected un-sanitized into LDAP queries allowing arbitrary lookups.
    • (04/28/2026) Fixed issue with webcam not recovering after being turned off and back on again without reloading.
    • (04/28/2026) Fixed issue with the microphone state getting out of sync with what it should be if toggled too quickly.
    • (04/07/2026) Fixed issue with reset persistent profile not working as NFS submounts were not propagated into the helper container.
    • (05/19/2026) Fixed multiple minor bugs in AWS provider module, regarding broken logging and crash handling.
    • (05/21/2026) Fixed issue with maximum simultaneous sessions settings in server where connection_type is ssh.
    • (06/03/2026) Fixed issue where end users selecting a deployment zone in an pool for servers was not respected.
    • (07/01/2026) Made the API server request thread pool size configurable by setting thread_pool (defaults to 20) under server in api.app.config.yaml, and added optional periodic logging of thread-pool utilization by setting thread_pool_log_interval (in seconds; 0 disables) in the same file.
    • (07/10/2026) Fixed backend validation for workspace file-download requests.
    • (07/31/2026) Improved logging and exception handling issues with autoscale VM providers.
    • (08/10/2026) Fixed kasm_agent restart loop caused by ghost Docker containers during clear_stale_mounts.
    • (08/10/2026) Fixed an issue where the Session Casting configuration's "Restrict to Referrers" setting did not deny requests when the Referer header was missing.
    • (08/18/2026) Fixed issue where Digital Ocean autoscale provisioning failed due to changes in the Digital Ocean API.
    • (08/30/2026) Fixed an issue where the API Server did not properly close database sessions when an unhandled exception occurred during a request.

  • Kasm UI

    • Security Fixes
    • (11/19/2025) Fixed registry memory value not being passed to workspaces.
    • (01/28/2026) Fixed an issue with previously stored values in the Egress provider form on user dashboard.
    • (03/11/2026) Fixed some issues with file mapping, including toggles not working on file uploads, and stale data when editing a file map.
    • (06/02/2026) Fixed search functionality in the Users table under the Groups section.

  • Guacamole

    • (03/20/2026) Fixed issue running Guacamole with a cluster size of 1
    • (05/09/2026) Fixed an issue where the connection proxy recording pipeline failed to encode .guac segments after the first successful upload.