CVE-2020-10663: Apple macOS

High severity, CVSS 7.5. EPSS: 6.8% chance of exploitation in the next 30 days.

The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar to CVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application-dependent.

Affected products

• Apple macOS: version 11.0.1 only
• Debian Debian Linux: version 8.0 only; version 10.0 only
• Fedoraproject Fedora: version 30 only; version 31 only
• JSON Project JSON: up to and including 2.2.0
• Opensuse Leap: version 15.1 only

Published 2020-04-28. Last modified 2026-06-17.