Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-70194.NET Framework Security Feature Bypass Vulnerability
Medium 6.5
In plain English
A medium-severity improper certificate validation in Microsoft Visual Studio 2022 version 17.14 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 57.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | microsoft.netcore.app.runtime.linux-arm | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 11.0.0-rc.2 | GHSA-fqpq-cx42-9jmm |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~24.04.1 | USN-8942-1 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.04.1 | USN-8942-1 |
| Ubuntu:26.10 | dotnet10 | 10.0.113-10.0.13-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu:26.10 | dotnet11 | 11.0.100-11.0.0~rc2-0ubuntu1~26.10.1 | USN-8942-1 |
| Ubuntu:26.10 | dotnet11 | 11.0.100-11.0.0~rc2-0ubuntu1~26.10.1 | UBUNTU-CVE-2026-70194 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-70194 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~22.04.1 | USN-8942-1 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.132-8.0.32-0ubuntu1~24.04.1 | USN-8942-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 11.0 runtime | 11.0.0 – before 11.0.0-rc.2 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.42 |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 – before 18.10.4 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
References
- .NET Framework Security Feature Bypass Vulnerability vendor-advisory, patch