85% of respondents use AI coding assistants -- but only 38% apply AI to support code review in pull requests. [...] AI-generated code produced 1.75x more logic and correctness errors, 1.57x more security findings, and was 2.74x more likely to introduce cross-site scripting (XSS) vulnerabilities.
Five years after the NYU study that first measured this, the numbers have not improved and the volume has. The gap in the first sentence is the whole finding: almost everyone is generating code with an assistant and well under half are using one to review it, so output has accelerated past the review capacity that was already the bottleneck. The multipliers in the second are worth reading carefully, because they are ratios rather than absolutes and human code is not the clean baseline they imply. What they do establish is direction: more code, less of it read, and a measurable tilt toward the specific classes of bug that get exploited.