Espruino before 1.99 allows attackers to cause a denial of service (application crash) with a user crafted input file via an integer overflow during syntax parsing. This was addressed by fixing stack size detection on Linux in jsutils.c.
https://github.com/espruino/Espruino/issues/1427
https://github.com/espruino/Espruino/files/2019243/so_0.txt
https://github.com/espruino/Espruino/commit/a0d7f432abee692402c00e8b615ff5982dde9780