Multi-Key Signature Validation Failure After Webhook Secret Rotation

Question

Multi-Key Signature Validation Failure After Webhook Secret Rotation

Andrea Dann 40

Hello, I noticed that after rotating the webhook secret, payment notification webhooks are consistently returning HTTP 401 responses due to an HMAC SHA256 signature validation mismatch. The issue appears to occur during authentication when requests signed with a newly rotated secret are processed. How to do next?

0 opmerkingen

Answer accepted by question author

0 extra antwoorden

Uw antwoord

Answer 1

Hello,

A 401 after webhook secret rotation usually means the sender and receiver are not using the same secret. Verify that your application is validating against the new secret and, during the transition, consider accepting signatures generated by both the old and new secrets.

Also ensure the HMAC SHA256 is calculated from the raw request body exactly as received, since any payload modification can cause a signature mismatch.

I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!

Domic Vo.