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Prerelease SDK 1.0.4312-prerelease, for Runtime 156 (Oct. 12, 2026)

Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Oct. 12, 2026.

NuGet package for WebView2 SDK 1.0.4312-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 156.0.4312.0 or later; see Preview Runtime 156.0.4314.8 (Oct. 12, 2026).

Promotions to Phase 2 (Stable in Prerelease)

The following APIs have been promoted from Phase 1: Experimental in Prerelease, to Phase 2: Stable in Prerelease, and are included in this Prerelease SDK.

Crash Report in ProcessFailed event

The CrashReport API provides crash diagnostic data when a WebView2 process fails with a crash. When a ProcessFailed event is raised, the host application can access the CrashReport property on the ProcessFailedEventArgs to retrieve crash signature details, including:

  • The exception code.
  • The faulting module name and version.
  • The fault offset.
  • The crash report ID.
  • The bucket ID.
  • The time the crash was reported.

ProcessFailedEventArgs.CrashReport is null when the failure didn't produce a crash report, such as in these scenarios:

  • A normal exit.
  • An external kill of the process.
  • A launch failure.
  • A hang.

ProcessFailedEventArgs.CrashReport may also be null for certain crash-type failures where no report was produced. Host apps should always check for null before accessing properties.

Previous phase: Crash Report in ProcessFailed event in Prerelease SDK 1.0.4126-prerelease, for Runtime 151 (Jul. 7, 2026).

See also

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