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Runtime 151.0.4129.50 (Aug. 3, 2026)

Release notes for Microsoft Edge WebView2 Runtime, release date: Aug. 3, 2026.

WebView2 Runtime is changing to a 2-week release cadence

Starting with version 152 (Aug. 24, 2026), the WebView2 Runtime moves to a 2-week release cadence. This is aligned with Microsoft Edge. WebView2 Runtime version 151 is the final release that's on a 4-week release cadence.

See [Announcement] WebView2 Runtime moves to a 2-week release cadence (starting v152).

Run your WebView2 host application at standard user integrity rather than elevated

Run your WebView2 host application at standard user integrity rather than elevated. See Recommended privilege level for WebView2 host applications in Develop secure WebView2 apps.

Bug fixes

  • Restricted access to a singleton host pipe in legacy WebView2 clients.

  • Fixed the reentrancy for frame deletion.

  • Fixed object wrapper access for a User Authorization File (UAF).

  • Stamped the browser-authoritative origin on the host pipe, to prevent a WebMessageReceivedEventArgs.Source spoof.

  • Restricted the access to a singleton host pipe, in a deprecated WebView2.

  • Removed the origin parameter from methods that access a native object.

  • Hardened WebView2 virtual-host kDeny enforcement against renderer spoofing and New Technology File System (NTFS)-junction escapes.

  • Fixed the window-to-visual UI Automation (UIA) tree.

  • Fixed a regression in the AddScriptToExecuteOnDocumentCreated API.

  • Implemented OnRendererResponsive for hang outcome tracking.

See also

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