Nine in ten biz applications harbor out-of-date, unsupported, insecure open-source code, study shows • The Register: almost all (99 per cent) of the codebases examined have at least one open source component and that 70 per cent of the code overall is open source. That's about twice as much as the company's 2015 report, which found only 36 per cent of audited code was open source.