VULNERABILITY INTELLIGENCE

CVE-2026-33210

CVSS score9.1 CRITICAL

EPSS probability0.87%

CISA KEVNot currently listed

Published2026-03-20

Last modified2026-08-21

Description

Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.