Varonis found a “Reprompt” attack that let a single link hijack Microsoft Copilot Personal sessions and exfiltrate data; Microsoft patched it in January 2026.
The assessment, which it conducted in December 2025, compared five of the best-known vibe coding tools — Claude Code, OpenAI Codex, Cursor, Replit, and Devin — by using pre-defined prompts to build ...
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