GHSA-f87w-3j5w-v58p
HIGHCefSharp affected by incorrect handle provided in unspecified circumstances in Mojo on Windows
Blast Radius
CefSharp.Wpf.NETCefSharp.Wpf.HwndHost.NETCefSharp.Wpf.NetCore.NETCefSharp.WinForms.NETCefSharp.WinForms.NetCore.NETCefSharp.OffScreen.NetCore.NETCefSharp.OffScreenReal-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
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | CefSharp.Wpf | all versions | 134.3.90 |
| .NETNuGet | CefSharp.Wpf.HwndHost | all versions | 134.3.90 |
| .NETNuGet | CefSharp.Wpf.NetCore | all versions | 134.3.90 |
| .NETNuGet | CefSharp.WinForms | all versions | 134.3.90 |
| .NETNuGet | CefSharp.WinForms.NetCore | all versions | 134.3.90 |
| .NETNuGet | CefSharp.OffScreen.NetCore | all versions | 134.3.90 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for CefSharp.Wpf. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
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.
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.
How O3 protects you
O3 pinpoints whether GHSA-f87w-3j5w-v58p is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-f87w-3j5w-v58p. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-f87w-3j5w-v58p in your dependencies?
O3 detects GHSA-f87w-3j5w-v58p across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.