Preview Runtime 153.0.4234.6 (Aug. 28, 2026)

Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Aug. 28, 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. See Prerelease testing using preview channels.

Bug fixes

• Fixed an issue that could cause WebView2 applications to crash during startup.

• Fixed a UAF in ClosePrintToStreamHandle.

• Fixed a cross-origin redirect failure when WebResourceRequested (WRR) was attached.

• Fixed downloads so they're submitted for antivirus scanning under the host app's identity instead of the shared Runtime's identity.

• Fixed Mark-of-the-Web prompt state so it's tracked per the host app instead of per the shared WebView2 Runtime.

• Passkey prompts now open in the correct WebView2 host window.

See also

• Release notes for WebView2
  • Release notes for the WebView2 Runtime
  • Release notes for WebView2 SDKs