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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.

• January 23, 2026
  JavaScript SDKFixes

  JavaScript SDK 3.38.4

• January 22, 2026
  JavaScript SDKFixes

  JavaScript SDK 3.38.3

• January 22, 2026
  Next-Gen WAF for JavaChanges

  Next-Gen WAF for Java 2.8.3

• January 15, 2026
  Next-Gen WAF agentChanges

  Next-Gen WAF agent 4.74.0

• January 14, 2026
  APIAdditions

  Next-Gen WAF: Added trend visualization type for custom dashboards

• January 12, 2026
  APIAdditions

  Manage thresholds for Next-Gen WAF workspaces

• January 7, 2026
  APIChanges

  Compute package `hashsum` and `size` fields are deprecated

• December 19, 2025
  JavaScript SDKFixes

  JavaScript SDK 3.38.2

• December 18, 2025
  JavaScript SDKFixesAdditions

  JavaScript SDK 3.38.0

• December 18, 2025
  JavaScript SDKFixes

  JavaScript SDK 3.38.1