Security and Limits in JSON
From the JSON cheat sheet · Validation and Security · verified Aug 2026
Security and Limits
Treat parsed JSON as untrusted structured input.
json
const data = JSON.parse(untrustedText)
validate(data)⚠️ Never parse JSON with eval
📌 Parsing does not validate business rules
🔍 Parsers may impose size and depth limits
🎯 Validate shape before using values
securitylimitsvalidation
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