CVE-2026-64684

RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.1.0, the rmcp crate's StreamableHttpClientTransport in crates/rmcp/src/transport/common/reqwest/streamablehttpclient.rs builds its defaulthttpclient with reqwest's automatic redirect policy and applies caller-supplied values...

CVE-2026-64684: Exposure of Sensitive Information to an Unauthorized Actor

RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.1.0, the rmcp crate's StreamableHttpClientTransport in crates/rmcp/src/transport/common/reqwest/streamablehttpclient.rs builds its defaulthttpclient with reqwest's automatic redirect policy and applies caller-supplied values...

PT-2026-94090

Name of the Vulnerable Software and Affected Versions rmcp versions prior to 2.1.0 Description The StreamableHttpClientTransport in the rmcp crate fails to mark caller-supplied custom HTTP headers as sensitive and uses a default HTTP client with an automatic redirect policy. When a compromised or...