# json (RubyGems) vulnerabilities

6 known vulnerabilities (3 high, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://rubygems.org/gems/json

## Advisories (6)

### [CVE-2026-71847](https://cve.now/CVE-2026-71847): Ruby JSON: JSON::ResumableParser#partial\_value dereferences a freed input buffer and crashes on truncated duplicate-key streams

- Severity: High 8.7
- Published: Aug 7, 2026
- Affected: from 2.20.0, fixed in 2.21.2.

### [CVE-2026-54696](https://cve.now/CVE-2026-54696): Ruby JSON: JSON generator heap buffer overflow when streaming to an IO

- Severity: Low 3.7
- Published: Jun 30, 2026
- Affected: from 2.9.0, fixed in 2.19.9.

### [CVE-2026-33210](https://cve.now/CVE-2026-33210): Ruby JSON has a format string injection vulnerability

- Severity: High 8.3
- Published: Mar 20, 2026
- Affected: from 2.18.0, fixed in 2.19.2; from 2.16.0, fixed in 2.17.1.2; from 2.14.0, fixed in 2.15.2.1.

### [CVE-2025-27788](https://cve.now/CVE-2025-27788): Ruby JSON Parser has Out-of-bounds Read

- Severity: High 7.5
- Published: Mar 12, 2025
- Affected: from 2.10.0, fixed in 2.10.2.

### [CVE-2020-10663](https://cve.now/CVE-2020-10663): The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object…

- Severity: Unrated
- Published: Apr 28, 2020
- Affected: fixed in 2.3.0.

### [CVE-2013-0269](https://cve.now/CVE-2013-0269): 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…

- Severity: Unrated
- Published: Feb 13, 2013
- Affected: fixed in 1.5.5; from 1.6.0, fixed in 1.6.8; from 1.7.0, fixed in 1.7.7.

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