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CVE-2026-33252 The Go MCP SDK used Go's standard encoding/json
Description
The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.1, the Go SDK's Streamable HTTP transport accepted browser-generated cross-site `POST` requests without validating the `Origin` header and without requiring `Content-Type: application/json`. In deployments without Authorization, especially stateless or sessionless configurations, this allows an arbitrary website to send MCP requests to a local server and potentially trigger tool execution. Version 1.4.1 contains a patch for the issue.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| go-sdk 1.4 | premières → < 1.4.1 | 1.4.1 |
Références
- github.com github.com
- github.com github.com
Chronologie
- Publiée
- Dernière modification