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.NET
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HIGH severity

CefSharp affected by incorrect handle provided in unspecified circumstances in Mojo on WindowsGHSA-f87w-3j5w-v58p

HIGH

GHSA-f87w-3j5w-v58p is a high-severity (CVSS 8.3) vulnerability in CefSharp.Wpf. A fix is available for CefSharp.Wpf — see the affected versions and patch details below.

Published
Updated
Affected
7 pkgs
Patched
7 / 7
Exploits
None indexed
Exploitation data as of Apr 12, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

7 pkgs affected
.NETCefSharp.Wpf.NETCefSharp.Wpf.HwndHost.NETCefSharp.Wpf.NetCore.NETCefSharp.WinForms.NETCefSharp.WinForms.NetCore.NETCefSharp.OffScreen.NetCore.NETCefSharp.OffScreen

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)

https://nvd.nist.gov/vuln/detail/CVE-2025-2783 https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop_25.html https://issues.chromium.org/issues/405143032

Affected Packages

7 total 7 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetCefSharp.Wpfall versions134.3.90dotnet add package CefSharp.Wpf --version 134.3.90
.NETNuGetCefSharp.Wpf.HwndHostall versions134.3.90dotnet add package CefSharp.Wpf.HwndHost --version 134.3.90
.NETNuGetCefSharp.Wpf.NetCoreall versions134.3.90dotnet add package CefSharp.Wpf.NetCore --version 134.3.90
.NETNuGetCefSharp.WinFormsall versions134.3.90dotnet add package CefSharp.WinForms --version 134.3.90
.NETNuGetCefSharp.WinForms.NetCoreall versions134.3.90dotnet add package CefSharp.WinForms.NetCore --version 134.3.90
.NETNuGetCefSharp.OffScreen.NetCoreall versions134.3.90dotnet add package CefSharp.OffScreen.NetCore --version 134.3.90

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for CefSharp.Wpf, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update CefSharp.Wpf to 134.3.90 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f87w-3j5w-v58p is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High) https://nvd.nist.gov/vuln/detail/CVE-2025-2783 https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop_25.html https://issues.chromium.org/issues/405143032
O3 Security · Impact-Aware SCA

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