dev.to· Oct 28, 2026· by jaytank

OpenAI API key exposed in the browser: NEXT_PUBLIC_, VITE_ and dangerouslyAllowBrowser

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The client said undefined, so the key got a prefix. Then the SDK refused to run in the browser, so it...
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#nextjs#react#security#vscode