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fix(core): validate RequestId integers against Number.MAX_SAFE_INTEGER #1806

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fix(core): validate RequestId integers against Number.MAX_SAFE_INTEGER #1806

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fa780fa
fix(auth): enforce form-urlencoded Content-Type for token endpoint
lanxevo3 Mar 26, 2026
984a27e
Merge branch 'main' of https://github.com/lanxevo3/typescript-sdk
lanxevo3 Mar 26, 2026
735b634
fix(core): validate RequestId integers against Number.MAX_SAFE_INTEGER
lanxevo3 Mar 28, 2026
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4 changes: 4 additions & 0 deletions packages/client/src/client/auth.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1439,6 +1439,10 @@ export async function executeTokenRequest(
applyClientAuthentication(authMethod, clientInformation as OAuthClientInformation, headers, tokenRequestParams);
}

// Ensure Content-Type is always form-urlencoded for the token endpoint (OAuth 2.1 §3.2).
// Some addClientAuthentication implementations may have inadvertently set a different value.
headers.set('Content-Type', 'application/x-www-form-urlencoded');

const response = await (fetchFn ?? fetch)(tokenUrl, {
method: 'POST',
headers,
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14 changes: 12 additions & 2 deletions packages/core/src/types/schemas.ts
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Expand Up @@ -119,8 +119,18 @@ export const ResultSchema = z.looseObject({

/**
* A uniquely identifying ID for a request in JSON-RPC.
*/
export const RequestIdSchema = z.union([z.string(), z.number().int()]);
* Rejects integers outside Number.MAX_SAFE_INTEGER to prevent JavaScript
* Map/Object key precision loss that causes server hangs (Issue #1765).
*/
export const RequestIdSchema = z.union([
z.string(),
z
.number()
.int()
.refine((n) => Math.abs(n) <= Number.MAX_SAFE_INTEGER, {
message: `Request ID must be a safe integer (|id| ≤ ${Number.MAX_SAFE_INTEGER})`
})
]);

/**
* A request that expects a response.
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