A Nigerian fintech just lost ₦20 million to a fake webhook.
Attacker didn’t hack anything.
They just POSTed this to the endpoint:
{
"event": "transfer.success",
"amount": 500000,
"status": "success"
}
Backend credited the user. Zero money moved.
This is happening more in crypto payments too.
What every backend dev must do in 2026:
1. Verify webhook signature + IP + timestamp (not just event name).
2. Never credit on webhook alone always confirm on-chain + NIBSS.
3. Add rate limiting and replay attack protection.
4. Reconcile every stablecoin inflow against blockchain truth.
Crypto rails move fast. One lazy endpoint and you’re done.
Save this like your production depends on it.
Drop your worst webhook horror story 👇
@Chanyi29_ Cameroonians don't just want to use the apps. Because, every bank do have an app that we can use to access our money at anytime, even transfer to orange and mobile money at no extra cost.