dev.to· Oct 4, 2026· by glenn_ree_c3534b3ab234d93

Someone Asked If My CSV Export Worked in Excel. It Didn't.

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A technically valid CSV can still be unreadable in Excel. Three real bugs - encoding, formula injection, and line endings - all found by asking one question.
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#webdev#javascript#security#csv