Use after free in CefSharp
CISA confirms exploitation of this vulnerability in real attacks. Prioritise checking whether your application is affected. CISA KEV · CC0 1.0
CVE-2020-16017: Use after free in site isolation
- https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop_11.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16017
Google is aware of reports that exploits for CVE-2020-16013 and CVE-2020-16017 exist in the wild.
There is currently little to no public information on the issue other than it has been flagged as High severity.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | CefSharp.Common | < 86.0.241 | 86.0.241 |
| .NET (NuGet) | CefSharp.WinForms | < 86.0.241 | 86.0.241 |
| .NET (NuGet) | CefSharp.Wpf | < 86.0.241 | 86.0.241 |
| .NET (NuGet) | CefSharp.Wpf.HwndHost | < 86.0.241 | 86.0.241 |
References
- Weakness (CWE)
CWE-416- Platform
- .NET (NuGet)
- Package
CefSharp.Common, CefSharp.WinForms, CefSharp.Wpf- Disclosed
- 27.11.2020
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gvqv-779r-4jgp - CC BY 4.0
Vulnerability history: CefSharp.Wpf.HwndHost
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 10.2020 04.2025
- Without a fix
- 0
- Exploited in attacks
- 5
Severity breakdown
- High 5
- Medium 1
Disclosures per year
- 2020: 4
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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