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api
Cascade Broke Webhook Signature Validation
Webhook signature validation is broken after Cascade refactored the verification code. This is a critical security issue - spoofed webhooks from attackers are being accepted as legitimate. Stripe or other webhook payloads are not being verified before processing.
Cascade likely removed or modified the signature verification logic during refactoring.
Error Messages You Might See
Webhook signature invalid
HMAC verification failed
Signature mismatch
Webhook authenticity could not be verified
Common Causes
- Cascade removed HMAC-SHA256 signature verification from webhook handler
- Webhook secret changed without updating verification code
- Cascade removed timestamp validation preventing replay attacks
- Algorithm mismatch in signature generation vs verification
How to Fix It
Implement webhook signature verification immediately. Verify request body signature against webhook secret using HMAC-SHA256. Validate timestamp is recent (within 5 minutes) to prevent replay attacks. Verify algorithm used matches webhook provider documentation. Test with invalid signature to ensure rejection.
Real developers can help you.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
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🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Franck Plazanet
I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
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My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture.
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David Olverson
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You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How do I verify Stripe webhooks?
Use stripe.webhooks.constructEvent() with endpoint secret. Catches signature verification and parsing.
What timestamp validation should I do?
Verify t parameter is within last 5 minutes to prevent replay. Check against current system time.