VulnerabilityAnalyzed

CVE-2025-27788

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.

HIGH 7.5EPSS 0.71%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.71% probability · 51th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: ruby-lang/javascript object notation
Source: security-advisories@github.com

References

https://github.com/ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadfPatch
https://github.com/ruby/json/releases/tag/v2.10.2Release Notes
https://github.com/ruby/json/security/advisories/GHSA-9m3q-rhmv-5q44Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.