Upgrade to email@example.com.
json is a JSON implementation as a Ruby extension in C
Affected versions of this package are vulnerable to Denial of Service (DoS).
When parsing certain JSON documents, the json gem (including the one bundled with Ruby) can be coerced into creating arbitrary objects in the target system.
This is the same issue as CVE-2013-0269. The previous fix was incomplete, which addressed JSON.parse(user_input), but didn’t address some other styles of JSON
parsing including JSON(user_input) and JSON.parse(user_input, nil).