Change to KEYWORD_NAME regex to add colon actually allows many characters

[teq0]

#1425 was intended to add ':' to the list of characters allowed in keyword names. Because of the placement of the colon in the regex, after a hyphen, it actually has the effect of allowing all characters from '$' to ':', which includes things like comma, single quote and asterisk.

The fix would be to change the regex at https://github.com/ajv-validator/ajv/blob/master/lib/core.ts#L745 from

^[a-z_$][a-z0-9_$-:]*$

to

^[a-z_$][a-z0-9_$:-]*$

What version of Ajv are you using? Does the issue happen if you use the latest version?
7.1.0

Ajv options object

{}

JSON Schema

Sample data

Your code

Validation result, data AFTER validation, error messages

What results did you expect?

Are you going to resolve the issue?

Yes.