CVE-2025-27788: Ruby-Lang JavaScript Object Notation

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

JSON is a JSON implementation for Ruby. Starting in version 2.10.0 and prior to version 2.10.2, a specially crafted document could cause an out of bound read, most likely resulting in a crash. Versions prior to 2.10.0 are not vulnerable. Version 2.10.2 fixes the problem. No known workarounds are available.

Affected products

• Ruby-Lang JavaScript Object Notation: from 2.10.0 , before 2.10.2 (fixed in 2.10.2)

Published 2025-03-12. Last modified 2026-06-17.