CVE-2026-63128
1 advisory.
crates.io/rmcp CVE-2026-63128: high 7.5, EPSS 0.53%
RMCP: Unauthenticated permanent session-table leak in rmcp Streamable HTTP server transport leads to remote denial-of-service
Action: Upgrade rmcp to 2.0.0 or later.
cargo update -p rmcp --precise 2.0.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.0.0 | - |
Fixed versions
| 2.0.0 |
Sources
- osv: GHSA-9pj6-vhgr-3mwh
- https://github.com/modelcontextprotocol/rust-sdk/security/advisories/GHSA-9pj6-vhgr-3mwh
- https://nvd.nist.gov/vuln/detail/CVE-2026-63128
- https://github.com/modelcontextprotocol/rust-sdk/pull/934
- https://github.com/modelcontextprotocol/rust-sdk/commit/dfa7fd6f9309deab60bea230b041be9a3fcda846
- https://github.com/modelcontextprotocol/rust-sdk
- https://github.com/modelcontextprotocol/rust-sdk/releases/tag/rmcp-v2.0.0
CVE-2026-63128 · published · modified · JSON