Safe Encoding Practices: A Developer Checklist
A practical checklist for encoding security: always encode output, never trust encoded input as safe, validate after decoding, and avoid double-encoding bugs.
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Tags: security, encoding, best-practices
Safe Encoding Practices: A Developer Checklist Encoding errors are among the most common sources of security vulnerabilities. The same developer who writes secure business logic often introduces XSS or injection vulnerabilities because they encoded data for the wrong context, used a library incorrectly, or skipped encoding in a "low-risk" code path. This checklist covers safe encoding practices by output context and language. Use it for code reviews and as a reference when building features that handle user input. --- How to Use This Checklist For each feature you build that renders user-controlled data: Identify every output context where that data appears (HTML body, attribute, URL, JavaScript, SQL, file path, shell command) Verify the encoding is context-appropriate Confirm you are…
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