CVE-2026-47303
High
Description
Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Microsoft .net
PublishedJul 14, 2026
First seenJul 14, 2026
How to fix
Update
- microsoft .net8.0.29, 9.0.18, 10.0.6 or later
- microsoft visual_studio_202217.12.22, 17.14.36 or later
- microsoft visual_studio_202618.7.4 or later
- Microsoft.AspNetCore.Authentication.Negotiate10.0.10, 9.0.18, 8.0.29 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net | 8.0.0 ≤ v < 8.0.29, 9.0.0 ≤ v < 9.0.18, 10.0.0 ≤ v < 10.0.6 | 8.0.29, 9.0.18, 10.0.6 |
| microsoft visual_studio_2022 | 17.12.0 ≤ v < 17.12.22, 17.14.0 ≤ v < 17.14.36 | 17.12.22, 17.14.36 |
| microsoft visual_studio_2026 | 18.7.0 ≤ v < 18.7.4 | 18.7.4 |
| Microsoft.AspNetCore.Authentication.NegotiateNuGet | 10.0.0 ≤ v < 10.0.10, 9.0.0 ≤ v < 9.0.18, 8.0.0 ≤ v < 8.0.29 | 10.0.10, 9.0.18, 8.0.29 |
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