CVE-2026-70194 .NET Framework Security Feature Bypass Vulnerability
Medium 6.5
Published
Updated
Check this codebase for CVE-2026-70194 and fix it if it is affected.
What it is: CVE-2026-70194 is a medium-severity vulnerability in Microsoft .NET 11.0 runtime, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-70194 in the wild and no public exploit code.
Affected packages and fixed versions:
- Microsoft.NETCore.App.Runtime.linux-arm (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-arm (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-70194/ (Markdown: https://insights.sbomify.com/CVE-2026-70194/index.md)
An attacker can bypass security features via improper certificate validation in .NET Framework, requiring a patch to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70194?
CVE-2026-70194 is a medium-severity vulnerability in Microsoft .NET 11.0 runtime, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.
Weakness: CWE-295
Which versions are affected by CVE-2026-70194?
16 open source packages ship an affected version, including Microsoft.NETCore.App.Runtime.linux-arm, Microsoft.NETCore.App.Runtime.linux-arm64 and Microsoft.NETCore.App.Runtime.linux-musl-arm.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.NETCore.App.Runtime.linux-arm NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-arm NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-musl-arm NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-musl-arm NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
10 more packages
Microsoft.NETCore.App.Runtime.linux-musl-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-musl-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-musl-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-musl-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.linux-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.osx-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.osx-arm64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.osx-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
Microsoft.NETCore.App.Runtime.osx-x64 NuGet | From 11.0.0-preview.1 | 11.0.0-rc.2 |
How do I fix CVE-2026-70194?
Upgrade Microsoft.NETCore.App.Runtime.linux-arm to 11.0.0-rc.2 or later.
Is CVE-2026-70194 being exploited?
There is no known exploitation of CVE-2026-70194 in the wild and no public exploit code.
Sources
Also known as GHSA-fqpq-cx42-9jmm, UBUNTU-CVE-2026-70194.