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https://github.com/documenso/documenso
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Webhook URLs were being fetched without validating whether they resolved to private/loopback addresses, exposing the server to SSRF. Current SSRF is best effort and fail open, you should never host services that you cant risk exposure of. This extracts webhook execution into a shared module that validates URLs against private IP ranges (including DNS resolution), enforces timeouts, and disables redirect following. The resend route now queues through the job system instead of calling fetch inline.
60 lines
1.4 KiB
TypeScript
60 lines
1.4 KiB
TypeScript
import type { Prisma } from '@prisma/client';
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import { fetchWithTimeout } from '../../utils/timeout';
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import { assertNotPrivateUrl } from './assert-webhook-url';
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const WEBHOOK_TIMEOUT_MS = 10_000;
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export type WebhookCallResult = {
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success: boolean;
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responseCode: number;
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responseBody: Prisma.InputJsonValue | Prisma.JsonNullValueInput;
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responseHeaders: Record<string, string>;
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};
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const parseBody = (text: string): Prisma.InputJsonValue => {
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try {
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return JSON.parse(text);
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} catch {
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return text;
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}
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};
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export const executeWebhookCall = async (options: {
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url: string;
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body: unknown;
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secret: string | null;
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}): Promise<WebhookCallResult> => {
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const { url, body, secret } = options;
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try {
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await assertNotPrivateUrl(url);
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const response = await fetchWithTimeout(url, {
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method: 'POST',
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body: JSON.stringify(body),
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redirect: 'manual',
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timeoutMs: WEBHOOK_TIMEOUT_MS,
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headers: {
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'Content-Type': 'application/json',
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'X-Documenso-Secret': secret ?? '',
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},
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});
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const text = await response.text();
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return {
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success: response.ok,
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responseCode: response.status,
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responseBody: parseBody(text),
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responseHeaders: Object.fromEntries(response.headers.entries()),
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};
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} catch (err) {
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return {
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success: false,
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responseCode: 0,
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responseBody: err instanceof Error ? err.message : 'Unknown error',
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responseHeaders: {},
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};
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}
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};
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