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, " ");