You work so hard on coding improvements... and it's all undone by a buggy component
Found on The Register on Tuesday, 18 October 2016

Nearly all (97 per cent) of Java applications contain at least one component with a known vulnerability, according to a new study by app security firm Veracode.
A single popular component with a critical vulnerability spread to more than 80,000 other software components, which were in turn then used in the development of potentially millions of software programs.
Java. Of course. The problem is always Java.