How much sensitive data could be leaked in parser exception messages?

[ungive]

This is nothing of severe importance, but I'd like to log parsing errors that might happen with credentials I am storing in the system keystore. This will likely never happen in practice, since the JSON is created by my program itself, but I wondered how much of the JSON contents could be leaked through JSON parser exception messages, since some of the contents will be shown to indicate where the error occurs, e.g.

[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'i' (101)

Are there cases where more of the contents are leaked? Checking myself isn't really worth the time for this niche case in my code, but maybe someone else is knowledgeable about the code base, this is something that is already handled or this is something that maybe could use some attention.

Anyhow, thanks for any insights!

[nlohmann]

A list of exceptions can be found here: https://json.nlohmann.me/home/exceptions/

Parse errors always contain the last read token.