Trivial RegExp DoS (leading spaces)

[jasisk]

The code block regex allows for a DoS. Can be reproduced with ~100 spaces.

Reproduction in regex debugger.

Reproduce in the playground:

text
                                                                                                                                                      
text

[narcis-fv]

This is a serious issue, I've been seeing it as well. Any workaround @jasisk until this gets answered?

[narcis-fv]

I've been removing the leading whitespace, using a regex:

const sanitizedString = inputString.replace(/\s+/g, " ");

[BLamy]

Also had the same problem. I've been using.

const sanitizedString = inputString.replace(/^ *$/gm, '\n')

This will replace lines that have just spaces on it with a new line