Upgrade modelcontextprotocol/sdk : 1.20.2 to Address CVE-2025-66414

[brahmareddybattula]

What version of Codex is running?

0.65.0

What subscription do you have?

Opensource user

Which model were you using?

No response

What platform is your computer?

No response

What issue are you seeing?

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. Prior to 1.24.0, The Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPServerTransport or SSEServerTransport and has not enabled enableDnsRebindingProtection, a malicious website could exploit DNS rebinding to bypass same-origin policy restrictions and send requests to the local MCP server. This could allow an attacker to invoke tools or access resources exposed by the MCP server on behalf of the user in those limited circumstances. Note that running HTTP-based MCP servers locally without authentication is not recommended per MCP security best practices. This issue does not affect servers using stdio transport. This vulnerability is fixed in 1.24.0.

What steps can reproduce the bug?

Please check CVE-2025-66414

What is the expected behavior?

There is no non-vulnerable upgrade path for this component/package. The inflight project has not been updated since 2016 and future releases containing a fix are unlikely. We recommend investigating alternative components or a potential mitigating control, such as removing the dependency from your project.

Additional information

No response

[Bronx83]

The codex application (the Rust binary) uses a native Rust implementation of the Model Context Protocol (specifically the rmcp crate and internal mcp-types), so it is not affected by CVE-2025-66414, which is specific to the Node.js SDK.

However, we do use @modelcontextprotocol/sdk in our sdk/typescript package for type definitions. Even though this package does not run an MCP server in production, I am upgrading the dependency to ^1.24.0 (specifically 1.24.3) to ensure compliance and safety for any development tools or future usage, even though it doesn't patch the mentioned CVE.

[brahmareddybattula]

thanks @Bronx83 and @etraut-openai .