GHSA-9G45-5XWM-F3WC RMCP: Custom HTTP headers leak to cross-origin redirect targets

Summary The rmcp crate's StreamableHttpClientTransport forwards caller-supplied custom HTTP headers such as X-API-Key, X-Auth-Token, Api-Key to cross-origin redirect targets. The defaulthttpclient function builds a reqwest::Client without a redirect policy override, so the default limited10 polic...

EUVD-2026-81266

RMCP: Custom HTTP headers leak to cross-origin redirect targets...

RMCP: Custom HTTP headers leak to cross-origin redirect targets

Summary The rmcp crate's StreamableHttpClientTransport forwards caller-supplied custom HTTP headers such as X-API-Key, X-Auth-Token, Api-Key to cross-origin redirect targets. The defaulthttpclient function builds a reqwest::Client without a redirect policy override, so the default limited10 polic...

Linux Distros Unpatched Vulnerability : CVE-2026-64684

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.1.0, the rmcp crate's StreamableHttpClientTransport in...

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 RMCP: Custom HTTP headers leak to cross-origin redirect targets

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 RMCP: Custom HTTP headers leak to cross-origin redirect targets

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 RMCP: Custom HTTP headers leak to cross-origin redirect targets

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

RMCP , the official Rust SDK for the Model Context Protocol, is affected in StreamableHttpClientTransport (prior to version 2.1.0). The custom_headers configured via StreamableHttpClientTransportConfig are applied to the reqwest client without being marked as sensitive. When a malicious or compro...

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...