The Cpanel::JSON::XS package before 4.33 for Perl performs out-of-bounds accesses in a way that allows attackers to obtain sensitive information or cause a denial of service.
https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.33/changes
https://github.com/rurban/Cpanel-JSON-XS/issues/208
https://github.com/rurban/Cpanel-JSON-XS/commit/41f32396eee9395a40f9ed80145c37622560de9b