Release SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)

Release notes for Microsoft Edge WebView2 SDK, release date: Sep. 28, 2026.

NuGet package for WebView2 SDK 1.0.4258.31

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime 154.0.4258.31 (Sep. 28, 2026) or later.

This Release SDK includes the same improvements as Prerelease SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026).

See also

• Prerelease SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)
• Runtime 154.0.4258.31 (Sep. 28, 2026)
• Release notes for WebView2
  • Release notes for the WebView2 Runtime
  • Release notes for WebView2 SDKs