Advisoriesby IbisMicrosoftCVE-2026-47303
Microsoft ASP.NET Core: authentication bypass
Fix: upgrade to 10.0.10 or later (6 fixed versions below)
Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| .NET 10.0 runtime Product | >= 10.0.0, < 10.0.10 | 10.0.10 |
| .NET 8.0 runtime Product | >= 8.0.0, < 8.0.29 | 8.0.29 |
| .NET 9.0 runtime Product | >= 9.0.0, < 9.0.18 | 9.0.18 |
| Microsoft Visual Studio 2022 version 17.12 Product | >= 17.12.0, < 17.12.22 | 17.12.22 |
| Microsoft Visual Studio 2022 version 17.14 Product | >= 17.14.0, < 17.14.36 | 17.14.36 |
| Microsoft Visual Studio 2026 version 18.7 Product | >= 18.0, < 18.7.4 | 18.7.4 |
Changes since it was listed
Fixed in: .NET 10.0 10.0.10, .NET 8.0 8.0.29, .NET 9.0 9.0.18 to .NET 10.0 runtime 10.0.10, .NET 8.0 runtime 8.0.29, .NET 9.0 runtime 9.0.18