medium5.9
CVE-2026-62899
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a ne…
Impact
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.NETCore.App.Runtime.linux-arm | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.linux-arm64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.linux-x64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.osx-arm64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
| nuget | Microsoft.NETCore.App.Runtime.osx-x64 | >= 10.0.0, <= 10.0.10 | 10.0.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Visual Studio 2022 | from 17.14.0 before 17.14.38 |
| Microsoft | Visual Studio 2026 | from 18.8.0 before 18.8.3 |
| Microsoft | .Net | from 8.0.0 before 8.0.30 from 9.0.0 before 9.0.19 from 10.0.0 before 10.0.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-r6mh-95jw-g7qg
- https://github.com/dotnet/runtime/security/advisories/GHSA-r6mh-95jw-g7qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-62899
- https://github.com/dotnet/announcements/issues/427
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62899