# Microsoft.AspNetCore.Components.WebAssembly.DevServer security updates

Patch Radar has 1 security fix for Microsoft.AspNetCore.Components.WebAssembly.DevServer, closing 1 CVE. The newest is KB5133966, released October 25, 2026.

- Web page: https://patchblox.com/security/product/microsoft/microsoft.aspnetcore.components.webassembly.devserver
- Platform: Microsoft
- Vendor: Microsoft
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [KB5133966](https://patchblox.com/security/data/fix/microsoft/kb5133966.md) | Oct 25, 2026 |  | Patch now | 4 | 1 |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo