CVE-2013-0269: Rubygems JSON Gem

High severity, CVSS 7.5. EPSS: 13.9% chance of exploitation in the next 30 days.

The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7 for Ruby allows remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain internal objects, as demonstrated by conducting a SQL injection attack against Ruby on Rails, aka "Unsafe Object Creation Vulnerability."

Affected products

• Rubygems JSON Gem: version 1.5.0 only; version 1.5.1 only; version 1.5.2 only; version 1.5.3 only; version 1.5.4 only; version 1.6.0 only; …

Published 2013-02-13. Last modified 2026-06-16.