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fix(server): reject a modern POST without the required MCP-Protocol-Version header (#2590)

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Co-authored-by: Konstantin Konstantinov <konstantin@mach5technology.com>
Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com>
This commit is contained in:
David Pavlovschii 2026-08-17 09:31:47 +03:00 • committed by GitHub
commit 75dc7ea6e2
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1 changed files with 328 additions and 43 deletions
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5
packages/middleware/node/test/toNodeHandler.test.ts
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@ -40,8 +40,9 @@ function modernToolsCall(name: string, args: Record<string, unknown>): unknown {
function bodyDerivedStandardHeaders(body: unknown): Record<string, string> {
if (body === null || typeof body !== 'object' || Array.isArray(body)) return {};
const b = body as { method?: unknown; params?: { name?: unknown; uri?: unknown; _meta?: Record<string, unknown> } };
if (typeof b.params?._meta?.[PROTOCOL_VERSION_META_KEY] !== 'string') return {};
const out: Record<string, string> = {};
const claimedVersion = b.params?._meta?.[PROTOCOL_VERSION_META_KEY];
if (b.params === undefined || typeof claimedVersion !== 'string') return {};
const out: Record<string, string> = { 'mcp-protocol-version': claimedVersion };
if (typeof b.method === 'string') out['mcp-method'] = b.method;
const name = b.method === 'resources/read' ? b.params.uri : b.params.name;
if (typeof name === 'string') out['mcp-name'] = name;