MicrosoftCVE-2026-62899
Microsoft .NET 10.0: request smuggling
Medium5.9CVE-2026-62899 · Published Aug 11, 2026 · updated Aug 14, 2026
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 Product | >= 10.0.0, < 10.0.11 | 10.0.11 |
| .NET 8.0 Product | >= 8.0.0, < 8.0.30 | 8.0.30 |
| .NET 9.0 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 |
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
More Microsoft advisories
All Microsoft| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 11 | Copilot Chat Security Feature Bypass Vulnerability | High7.1 | 1.132.1 |
| Aug 11 | Copilot Custom Agent Hook Remote Code Execution Vulnerability | High7.8 | 1.132.1 |
| Aug 11 | Information disclosure vulnerability | Medium | 1.132.1 |
| Aug 11 | Fileless RCE in VS Code Web Remote Terminal via URL-Controlled NODE_OPTIONS | High8.8 | 1.132.1 |
| Aug 11 | Visual Studio Code web deployments - environmentService.ts - RCE via NODE_OPTIONS --import from URL payload | High8.8 | 1.132.1 |
| Aug 11 | TerminalInstance._createProcess - Workspace Trust bypass via terminal waitOnExit | High7.8 | 1.132.1 |