Reg : CVE-2021-42574 :: How to check my Objective C & Swift code is having any problematic character?

Can you post an example, so we can see what you mean?

 https://nvd.nist.gov/vuln/detail/CVE-2021-42574

First up, I want to address a direct question from your other thread:

Any update from Apple on CVE-2021-42574 fix ?

DevForums is not an official Apple communications channel and so we don’t announce things here. If you want to keep up-to-date with Apple developer-oriented news, I recommend that you monitor Developer > News and Developer > News > Releases and the associated release notes. Both channels have handy-dandy RSS feeds.

How to check my Objective C & Swift code is having any BiDi character?

AFAIK Xcode does not have automatic support for this. However, that shouldn’t stop you from building your own tooling to check code as you integrate it into your project.

If you’d like to see us add automatic support for this to Xcode, I encourage you to file a bug describing your requirements. Please post your bug number, just for the record.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"