https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-02T16:36:40.785438+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-33252 CVE-2026-33252 — MCP Go SDK Allows Cross-Site Tool Execution for HTTP Servers without Authorizatrion 2026-10-02T16:36:40.802020+00:00

Affected: modelcontextprotocol go-sdk

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.