GHSA-2x7m-gf85-3745 is a high-severity (CVSS 7.5) vulnerability in Microsoft.Native.Quic.MsQuic.OpenSSL. A fix is available for Microsoft.Native.Quic.MsQuic.OpenSSL — see the affected versions and patch details below.
Remote Denial of Service Vulnerability in Microsoft QUIC
Real-World Exposure
Microsoft.Native.Quic.MsQuic.OpenSSL.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.Schannel.NETMicrosoft.Native.Quic.MsQuic.OpenSSL.NETMicrosoft.Native.Quic.MsQuic.OpenSSLReal-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
Impact
The MsQuic server will continue to leak memory until no more is available, resulting in a denial of service.
Patches
The following patch was made:
- Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/5d070d661c45979946615289e92bb6b822efe9e9
Workarounds
Beyond upgrading to the patched versions, there is no other workaround.
MSRC CVE Info
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26190
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | all versions | 2.1.12dotnet add package Microsoft.Native.Quic.MsQuic.OpenSSL --version 2.1.12 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | ≥ 2.2.0&&< 2.2.7 | 2.2.7dotnet add package Microsoft.Native.Quic.MsQuic.Schannel --version 2.2.7 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | ≥ 2.3.0&&< 2.3.5 | 2.3.5dotnet add package Microsoft.Native.Quic.MsQuic.Schannel --version 2.3.5 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.Schannel | all versions | 2.1.12dotnet add package Microsoft.Native.Quic.MsQuic.Schannel --version 2.1.12 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | ≥ 2.2.0&&< 2.2.7 | 2.2.7dotnet add package Microsoft.Native.Quic.MsQuic.OpenSSL --version 2.2.7 |
| .NETNuGet | Microsoft.Native.Quic.MsQuic.OpenSSL | ≥ 2.3.0&&< 2.3.5 | 2.3.5dotnet add package Microsoft.Native.Quic.MsQuic.OpenSSL --version 2.3.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.Native.Quic.MsQuic.OpenSSL, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Microsoft.Native.Quic.MsQuic.OpenSSL to 2.1.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2x7m-gf85-3745 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-2x7m-gf85-3745 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-2x7m-gf85-3745. 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-2x7m-gf85-3745 in your dependencies?
O3 Security finds GHSA-2x7m-gf85-3745 across NuGet dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.