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Known vulnerabilities in @modelcontextprotocol sdk

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CVE Summary Score Published
CVE-2026-111768 Model Context Protocol TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation 7.5 High Nov 5, 2026
CVE-2026-111769 Model Context Protocol TypeScript SDK: HTTP client transports and OAuth requests followed cross-origin redirects and re-sent custom headers and request bodies 6.5 Medium Nov 5, 2026
CVE-2026-111771 Model Context Protocol TypeScript SDK: Server bearer authentication accepted tokens issued for another service 6.8 Medium Nov 5, 2026

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