Older release logs

LiteSpeed Web Server changelog¶ Note We do our best to update this changelog in a timely manner. However, if a build is missing, you can always find the release announcement in our LiteSpeed Edge Google Group. Check the currently installed build number: cat lsws/BUILD Update to the latest build: /usr/local/lsws/admin/misc/lsup.sh -f -v 6.3.6 Version 6.4 Release Candidates¶ RC1¶ Build 2¶ Released: August 13, 2026 [Bug fix] Address an issue in Anubis sub-request handling. [Bug fix] Address an Anubis configuration issue. [Bug fix] Address Node.js application process management issue that leaves multiple worker processes running. [Bug fix] Address an ESI/SSI sub-request cancellation corner case. Build 1¶ Released: August 3, 2026 [Bug fix] Allow \ in query string for HTTP/2 and HTTP/3 request headers. [Bug fix] Address another HTTP/2 request body length corner case that caused 400 status codes from proxy backends. [Improvement] Support for multiple remote ACL URLs. Build 0¶ Released: July 28, 2026 [Feature] Add Anubis proof-of-work support. [Feature] Add ALTCHA CAPTCHA support. [Feature] Add Zstandard compression support. [Feature] Add background cache refresh support. [Feature] Add new UI for WebAdmin management console. [Feature] Strengthen HTTP/2 and HTTP/3 resource abuse protection. [Bug fix] Include all bug fixes applied to 6.3.x releases. Version 6.3.6¶ Build 8¶ Released: August 17, 2026 [Security] Block setting of important internal-use environment variables from .htaccess. [Bug fix] Address a race condition corner case for ModSecurity engine. Build 7¶ Released: August 13, 2026 [Bug fix] Address Node.js application process management issue that leaves multiple worker processes running. [Bug fix] Address an ESI/SSI sub-request cancellation corner case. Build 6¶ Release