One of the most common security issues I in code reviews is sensitive information, such as production credentials, API keys, etc, in the source code. The source code I just pulled from the repository. The source code all the developers before me have also pulled down to their local computers. Developers who might not work at the company anymore.
Most people are honest and won’t do anything bad with the information but there are exceptions. Even if developer is honest they might accidently expose the sensitive information such as a stolen laptop or their home network getting compromised.
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