Security context

Highlights

Memory Safety: 3 prior fixes. Scrutinize any change in this area.

src/lib_json/json_reader.cpp: most-fixed (2 issues). Treat as high-risk during review.

3 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

Memory Corruption: Unsafe manual trailing zero truncation on a fixed-size buffer inside `valueToString(double)` allows stack corruption; the fix replaced this logic with simplified, standard formatting functions like snprintf.

Memory Safety: An integer overflow in string allocation and negative token lengths allow out-of-bounds memory corruption when handling large strings or tokens.

Memory Safety: A stack-based buffer overflow (off-by-one write) occurred during the parsing of 32-character floating-point numbers due to inadequate buffer sizes relative to fixed-size parsing limits.