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The Hacker News AI Security · November 5, 2026

Patched HTML-preview bypass: test nested frames and popup permissions

analysis Agent SecurityAI Red TeamingAI Engineering
Why it matters

Check Point documents a ChatGPT HTML-preview weakness where nested frames bypassed a JavaScript popup wrapper while permissive sandbox attributes allowed escape. The desktop client permitted the demonstrated data-exfiltration path without a user gesture. The researchers report that OpenAI removed the relevant popup permissions on September 18, 2026 and that retesting confirmed the fix.

My takeaway: Test generated-content previews across nested frames, popups and desktop webviews. Enforce restrictions through platform sandbox policies as well as JavaScript wrappers, and verify outbound behavior with regression cases. Keep browser interaction requirements distinct from desktop behavior when describing impact.
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