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This changelog provides information on changes across the Fastly platform, including to the VCL language, our public API, CLI, Terraform provider, Compute Rust SDK, Compute JavaScript SDK, Compute Go SDK and Next-Gen WAF.

• May 18, 2026
  JavaScript SDKFixes

  JavaScript SDK 3.42.1

• May 14, 2026
  Next-Gen WAF announcementsAdditions

  New Envoy Gateway integration

• May 14, 2026
  Next-Gen WAF announcementsAdditions

  New Google Cloud Service Extensions integration

• May 14, 2026
  Next-Gen WAF agentChanges

  Next-Gen WAF agent 4.78.0

• May 11, 2026
  JavaScript SDKFixesAdditions

  JavaScript SDK 3.42.0

• May 7, 2026
  Next-Gen WAF for Node.jsChanges

  Next-Gen WAF for Node.js 2.4.2

• May 5, 2026
  APIAdditions

  Add documentation for max_lifetime and max_use backend properties

• May 4, 2026
  JavaScript SDKFixes

  JavaScript SDK 3.41.2

• April 21, 2026
  Next-Gen WAF announcementsAdditions

  Added system lists

• April 16, 2026
  APIAdditions

  Next-Gen WAF: Added WAF simulate endpoint