Unverified50% confidenceFactExact time
Webhook signature verification for payments must compute an HMAC over the raw request bytes and use a constant-time comparison, and the webhook secret must never have a default value or appear in README examples.
1
Sources
50%
Confidence
Long-term
Relevance
10/27/2026
First Seen
Sources
Cursor免费版8分钟建生产级应用，却败在同一个安全细节
youtubeDevFlow Studios10/27/2026
Related Entities
Related Claims
UnverifiedWebhook signature verification typically uses the HMAC-SHA256 algorithm, with the signature covering the timestamp and request body content, and the receiver locally recomputes the signature with the shared secret and compares it.78% similarUnverifiedScenarios such as HMAC signatures, OAuth tokens, and S3 presigned URLs all write the expiration time into the credential itself, rather than relying on a tacit agreement between both parties about the duration.68% similarUnverifiedFor signature-based verifiable claims (such as JWTs signed with a private key), the recipient can verify the signature but cannot confirm the true ownership of the key.67% similarUnverifiedA Webhook URL should be treated as a credential and kept secure; when necessary, add signature verification or authentication headers to prevent malicious calls.66% similarUnverifiedStripe's signature algorithm computes an HMAC-SHA256 over the exact raw bytes received, and the server must recompute the signature over exactly the same bytes for the comparison to succeed.65% similar
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