[{"data":1,"prerenderedAt":193},["ShallowReactive",2],{"blog-checklists/webhook-security-checklist":3},{"id":4,"title":5,"body":6,"category":170,"date":171,"dateModified":171,"description":172,"draft":173,"extension":174,"faq":175,"featured":173,"headerVariant":178,"image":179,"keywords":179,"meta":180,"navigation":181,"ogDescription":182,"ogTitle":179,"path":183,"readTime":179,"schemaOrg":184,"schemaType":185,"seo":186,"sitemap":187,"stem":188,"tags":189,"twitterCard":191,"__hash__":192},"blog/blog/checklists/webhook-security-checklist.md","Webhook Security Checklist: 12-Item Guide for Safe Integrations",{"type":7,"value":8,"toc":164},"minimark",[9,16,19,22,47,65,82,100,105,108,111,133,152],[10,11,12],"tldr",{},[13,14,15],"p",{},"Never trust unverified webhooks. Always verify signatures before processing payloads, validate the payload structure, handle events idempotently, and respond quickly to avoid timeouts. 4 critical items must be fixed before launch, 5 important items within the first week, and 3 recommended items when you can.",[13,17,18],{},"Webhooks are basically strangers knocking on your door claiming to be from Stripe or GitHub. Without signature verification, you have no idea if that is actually true. This checklist walks through the security patterns that keep your webhook endpoints from becoming an open invitation for spoofed requests.",[20,21],"print-button",{},[23,24,26,31,35,39,43],"checklist-section",{"title":25},"Quick Checklist (5 Critical Items)",[27,28],"checklist-item",{"description":29,"label":30},"Never process unverified payloads","Always verify webhook signatures",[27,32],{"description":33,"label":34},"Use environment variables, never hardcode","Store signing secrets securely",[27,36],{"description":37,"label":38},"Do not charge customers twice for the same event","Handle events idempotently",[27,40],{"description":41,"label":42},"Never accept webhooks over unencrypted connections","Use HTTPS only",[27,44],{"description":45,"label":46},"Check payloads match expected format before processing","Validate payload structure",[23,48,51,54,57,61],{"title":49,"count":50},"Signature Verification","4",[27,52],{"description":53,"label":30},"Use the signing secret from your provider. Never process unverified payloads. How to verify webhook signatures",[27,55],{"description":56,"label":34},"Use environment variables. Never hardcode signing secrets in your codebase. How to secure webhook secrets",[27,58],{"description":59,"label":60},"Many webhooks include timestamps. Reject events older than 5 minutes to prevent replay attacks. How to prevent replay attacks","Check timestamp to prevent replay",[27,62],{"description":63,"label":64},"Stripe, GitHub, and others provide SDKs with signature verification built in. Use them. How to use webhook SDKs","Use provider SDKs when available",[23,66,68,71,74,78],{"title":67,"count":50},"Payload Handling",[27,69],{"description":70,"label":46},"Check that payloads match expected format. Do not assume fields exist. How to validate payloads",[27,72],{"description":73,"label":38},"Webhooks may be delivered multiple times. Do not charge customers twice for the same event. How to implement idempotency",[27,75],{"description":76,"label":77},"Store event IDs you have processed. Skip events you have already handled. How to track processed events","Track processed event IDs",[27,79],{"description":80,"label":81},"Only process event types you expect. Ignore unknown event types gracefully. How to handle event types","Validate event types",[23,83,85,88,92,96],{"title":84,"count":50},"Endpoint Security",[27,86],{"description":87,"label":42},"Webhook endpoints must use HTTPS. Never accept webhooks over unencrypted connections. How to secure webhook endpoints",[27,89],{"description":90,"label":91},"Return 200 immediately after receiving. Process heavy work asynchronously with a queue. How to process webhooks asynchronously","Respond quickly",[27,93],{"description":94,"label":95},"Log received events for debugging. Do not log full payloads if they contain sensitive data. How to log webhook events","Log webhook events",[27,97],{"description":98,"label":99},"Alert on repeated failures or signature mismatches. Could indicate attacks or configuration issues. How to monitor webhook health","Monitor for failures",[101,102,104],"h2",{"id":103},"webhooks-are-attack-vectors","Webhooks Are Attack Vectors",[13,106,107],{},"Your webhook endpoint is publicly accessible. Anyone can send POST requests to it. Without signature verification, attackers can spoof events and trick your system into taking actions. A fake payment webhook could grant access without payment.",[13,109,110],{},"Always verify signatures. It is the only way to know the webhook came from the expected source. Most providers sign their webhooks. Use this mechanism.",[112,113,114,121,127],"faq-section",{},[115,116,118],"faq-item",{"question":117},"Why do I need to verify webhook signatures?",[13,119,120],{},"Anyone can send POST requests to your webhook endpoint. Without signature verification, attackers can spoof events. Signature verification proves the webhook came from the expected source, not a malicious actor.",[115,122,124],{"question":123},"What does idempotent webhook handling mean?",[13,125,126],{},"Idempotent handling means processing the same webhook multiple times produces the same result. Webhook providers may retry on failure, sending the same event multiple times. Your handler must not charge customers twice or create duplicate records.",[115,128,130],{"question":129},"What if my webhook handler is slow?",[13,131,132],{},"Return 200 immediately after signature verification, then process the event asynchronously using a job queue. Slow responses can trigger timeouts and retries, causing duplicate processing.",[134,135,136,142,147],"related-articles",{},[137,138],"related-card",{"description":139,"href":140,"title":141},"Secure payment processing setup","/blog/checklists/payment-integration-checklist","Payment Integration Checklist",[137,143],{"description":144,"href":145,"title":146},"Step-by-step Stripe webhook guide","/blog/how-to/verify-stripe-webhooks","How to Verify Stripe Webhooks",[137,148],{"description":149,"href":150,"title":151},"Secure GitHub webhook integration","/blog/how-to/verify-github-webhooks","How to Verify GitHub Webhooks",[153,154,157,161],"cta-box",{"href":155,"label":156},"/","Start Free Scan",[101,158,160],{"id":159},"scan-your-webhook-endpoints","Scan Your Webhook Endpoints",[13,162,163],{},"Check for common webhook security misconfigurations.",{"title":165,"searchDepth":166,"depth":166,"links":167},"",2,[168,169],{"id":103,"depth":166,"text":104},{"id":159,"depth":166,"text":160},"checklists","2026-02-09","Security checklist for webhook endpoints. Verify signatures, validate payloads, handle retries, and protect your application from webhook spoofing attacks.",false,"md",[176,177],{"question":117,"answer":120},{"question":123,"answer":126},"green",null,{},true,"Security checklist for webhook endpoints covering signature verification and payload handling.","/blog/checklists/webhook-security-checklist","[object Object]","HowTo",{"title":5,"description":172},{"loc":183},"blog/checklists/webhook-security-checklist",[190],"Security Checklist","summary_large_image","KKu7tDBc_XRmgCHsXHh-7qMtjCmvRh5B8FgKKRrARQw",1775843930406]