GHSA-QPX9-HPMF-5GMW Underscore has unlimited recursion in _.flatten and _.isEqual, potential for DoS attack

Impact In simple words, some programs that use .flatten or .isEqual could be made to crash. Someone who wants to do harm may be able to do this on purpose. This can only be done if the program has special properties. It only works in Underscore versions up to 1.13.7. A more detailed explanation...