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Preview Runtime 157.0.4341.10 (Oct. 22, 2026)

Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Oct. 22, 2026.

This is a Preview Runtime, for early testing. Prerelease testing of WebView2 SDKs uses a preview channel of Microsoft Edge (Beta, Dev, or Canary), which includes the WebView2 Preview Runtime.

These release notes are for the WebView2 Preview Runtime, which corresponds to the Beta preview channel of Microsoft Edge. We recommend testing your app using the Beta preview channel of Microsoft Edge, before these changes are promoted to Stable. If you want to test even earlier, you can test against Edge Dev or Edge Canary.

See Prerelease testing using preview channels of Microsoft Edge.

In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge 157; see Microsoft Edge 157 web platform release notes (Nov. 5, 2026).

Bug fixes

  • Fixed a WebView2 proxy release race condition.
  • Removed a latent stack-use-after-return in the WebView2 embedded browser's File System Access (FSA) permission flow.
  • Fixed a passkey sign-in hang due to null HWND.

See also

  • อัปเดตล่าสุดเมื่อ