CefSharp affected by incorrect handle provided in unspecified circumstances in Mojo on Windows

Severity: low · CVSS 3.1 · Published 2025-04-12

CefSharp affected by incorrect handle provided in unspecified circumstances in Mojo on Windows

Technologies: CefSharp.WinForms (NuGet), CefSharp.Wpf (NuGet), CefSharp.Wpf.HwndHost (NuGet). Vendors: NuGet.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
Low severity, with a CVSS score of 3.1, published 12 April 2025.
Which products and versions are affected?
CefSharp.OffScreen (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90; CefSharp.OffScreen.NetCore (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90; CefSharp.WinForms (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90; CefSharp.WinForms.NetCore (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90; and 3 more.
Is there a fix for This vulnerability?
Yes. CefSharp.OffScreen (NuGet): upgrade to 134.3.90 or later; CefSharp.OffScreen.NetCore (NuGet): upgrade to 134.3.90 or later; CefSharp.WinForms (NuGet): upgrade to 134.3.90 or later; CefSharp.WinForms.NetCore (NuGet): upgrade to 134.3.90 or later; CefSharp.Wpf (NuGet): upgrade to 134.3.90 or later; CefSharp.Wpf.HwndHost (NuGet): upgrade to 134.3.90 or later; CefSharp.Wpf.NetCore (NuGet): upgrade to 134.3.90 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected?
Check whether you run CefSharp.OffScreen (NuGet), CefSharp.OffScreen.NetCore (NuGet), CefSharp.WinForms (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • CefSharp.OffScreen (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.OffScreen --version 134.3.90
  • CefSharp.OffScreen.NetCore (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.OffScreen.NetCore --version 134.3.90
  • CefSharp.WinForms (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.WinForms --version 134.3.90
  • CefSharp.WinForms.NetCore (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.WinForms.NetCore --version 134.3.90
  • CefSharp.Wpf (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.Wpf --version 134.3.90
  • CefSharp.Wpf.HwndHost (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.Wpf.HwndHost --version 134.3.90
  • CefSharp.Wpf.NetCore (NuGet): upgrade to 134.3.90 or later
    dotnet add package CefSharp.Wpf.NetCore --version 134.3.90

Affected products

  • CefSharp.OffScreen (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.OffScreen.NetCore (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.WinForms (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.WinForms.NetCore (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.Wpf (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.Wpf.HwndHost (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90
  • CefSharp.Wpf.NetCore (NuGet) ECOSYSTEM:introduced=0,fixed=134.3.90

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