Do AI assistants introduce security vulnerabilities?
They can, in the same way any fast-moving contributor can. The higher risk is not exotic bugs but ordinary ones at scale: a missing authorisation check on one route out of forty. That is why review and automated checks matter more, not less, as the volume of generated code goes up.
From Cursor, Copilot, Claude Code: assistants compared, updated 9 August 2026. That article is where the reasoning behind this answer is set out, including what it does not cover.