medium5.9
CVE-2026-66822
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
Impact
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.NETCore.App.Runtime.linux-arm | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.linux-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.linux-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.osx-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.osx-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.win-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.win-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.NETCore.App.Runtime.win-x86 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wxxw-5cvc-53j7
- https://github.com/dotnet/runtime/security/advisories/GHSA-wxxw-5cvc-53j7
- https://github.com/dotnet/announcements/issues/448
- https://github.com/dotnet/runtime/issues/135697
- https://nvd.nist.gov/vuln/detail/CVE-2026-66822
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66822