CVE-2026-33210
CriticalCVSS 9.1Exploitation Probability (EPSS)
Elevated risk55th percentile - higher than 55% of all known CVEs
Summary
A format string injection vulnerability in Ruby JSON (versions 2.14.0 to before 2.15.2.1, 2.17.1.2, and 2.19.2) allows denial of service or information disclosure when the allow_duplicate_key: false parsing option is used on user-supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.
Risk Assessment
An attacker can cause denial of service or leak sensitive information from the system, threatening the availability and confidentiality of organizational data.
Recommendation
Immediately update the Ruby JSON library to one of the patched versions: 2.15.2.1, 2.17.1.2, or 2.19.2.
Original NVD description (English source)
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.