CVE-2026-64684
1 advisory.
crates.io/rmcp CVE-2026-64684: medium 6.8
RMCP: Custom HTTP headers leak to cross-origin redirect targets
Action: Upgrade rmcp to 2.1.0 or later.
cargo update -p rmcp --precise 2.1.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.1.0 | - |
Fixed versions
| 2.1.0 |
Sources
- osv: GHSA-9g45-5xwm-f3wc
- https://github.com/modelcontextprotocol/rust-sdk/security/advisories/GHSA-9g45-5xwm-f3wc
- https://nvd.nist.gov/vuln/detail/CVE-2026-64684
- https://github.com/modelcontextprotocol/rust-sdk/pull/936
- https://github.com/modelcontextprotocol/rust-sdk/commit/496902b9cf2c8a947454718da31829ae776b969b
- https://github.com/modelcontextprotocol/rust-sdk
- https://github.com/modelcontextprotocol/rust-sdk/releases/tag/rmcp-v2.1.0
CVE-2026-64684 · published · modified · JSON