Advisoriesby IbisMicrosoftCVE-2026-62899
Microsoft .NET 10.0 runtime: request smuggling
Fix: upgrade to 10.0.11 or later (5 fixed versions below)
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| .NET 10.0 runtime Product | >= 10.0.0, < 10.0.11 | 10.0.11 |
| .NET 8.0 runtime Product | >= 8.0.0, < 8.0.30 | 8.0.30 |
| .NET 9.0 runtime Product | >= 9.0.0, < 9.0.19 | 9.0.19 |
| Microsoft Visual Studio 2022 version 17.14 Product | >= 17.14.0, < 17.14.38 | 17.14.38 |
| Microsoft Visual Studio 2026 version 18.8 Product | >= 18.0, < 18.8.3 | 18.8.3 |
Changes since it was listed
Fixed in: .NET 10.0 10.0.11, .NET 8.0 8.0.30, .NET 9.0 9.0.19 to .NET 10.0 runtime 10.0.11, .NET 8.0 runtime 8.0.30, .NET 9.0 runtime 9.0.19
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-444