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CVE-2026-42559: DNS Rebinding in rmcp's Streamable HTTP Server Transport

This story is from 2026-09-20. It is preserved in the archive; the latest stories are on the live feed.

Overview Field Value CVE ID CVE-2026-42559 Component rmcp (official Rust SDK for the Model Context Protocol) Vulnerable location crates/rmcp/src/transport/streamable_http_server/tower.rs Affected versions rmcp Patched version rmcp >= 1.4.0 (commit 8e22aa2 , PR #764) CVSS 3.1 8.8 (High) — AV:N/AC:L/…

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  1. 2026-09-20 06:48 · DEV Community — AI
    CVE-2026-42559: DNS Rebinding in rmcp's Streamable HTTP Server Transport

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