# json (RubyGems) vulnerabilities

Source: https://junglewise.ai/threats/technologies/rubygems-json  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/rubygems-json.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in json (RubyGems): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-71847, was published on 7 August 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 6 (1 critical, 0 exploited in the wild)

## About json (RubyGems)

Ruby library for parsing and generating JSON data format.

## Latest json (RubyGems) vulnerabilities

- [CVE-2026-71847: Ruby JSON heap-use-after-free in ResumableParser](https://junglewise.ai/threats/cve-2026-71847-ruby-json-heap-use-after-free-in-resumableparser) (low, CVSS 5.3, published 7 Aug 2026)
- [CVE-2026-54696: Ruby JSON heap buffer overflow in JSON generator streaming](https://junglewise.ai/threats/cve-2026-54696-ruby-json-heap-buffer-overflow-in-json-generator-streaming) (low, CVSS 3.7, published 30 Jun 2026)
- [CVE-2026-33210: Ruby JSON format string injection in JSON parser](https://junglewise.ai/threats/cve-2026-33210-ruby-json-format-string-injection-in-json-parser) (critical, CVSS 9.1, published 20 Mar 2026)
- [CVE-2025-27788: Out-of-bounds Read in Ruby JSON Parser](https://junglewise.ai/threats/cve-2025-27788-out-of-bounds-read-in-ruby-json-parser) (low, CVSS 3.1, published 12 Mar 2025)
- [CVE-2020-10663: Unsafe object creation in json RubyGem](https://junglewise.ai/threats/cve-2020-10663-unsafe-object-creation-in-json-rubygem) (low, CVSS 3.1, published 27 Jul 2020)
- [CVE-2013-0269: JSON gem has Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2013-0269-json-gem-has-improper-input-validation-vulnerability) (info, published 24 Oct 2017)

## Most severe json (RubyGems) vulnerabilities

- [CVE-2026-33210: Ruby JSON format string injection in JSON parser](https://junglewise.ai/threats/cve-2026-33210-ruby-json-format-string-injection-in-json-parser) (critical, CVSS 9.1, published 20 Mar 2026)
- [CVE-2026-71847: Ruby JSON heap-use-after-free in ResumableParser](https://junglewise.ai/threats/cve-2026-71847-ruby-json-heap-use-after-free-in-resumableparser) (low, CVSS 5.3, published 7 Aug 2026)
- [CVE-2026-54696: Ruby JSON heap buffer overflow in JSON generator streaming](https://junglewise.ai/threats/cve-2026-54696-ruby-json-heap-buffer-overflow-in-json-generator-streaming) (low, CVSS 3.7, published 30 Jun 2026)
- [CVE-2020-10663: Unsafe object creation in json RubyGem](https://junglewise.ai/threats/cve-2020-10663-unsafe-object-creation-in-json-rubygem) (low, CVSS 3.1, published 27 Jul 2020)
- [CVE-2025-27788: Out-of-bounds Read in Ruby JSON Parser](https://junglewise.ai/threats/cve-2025-27788-out-of-bounds-read-in-ruby-json-parser) (low, CVSS 3.1, published 12 Mar 2025)
- [CVE-2013-0269: JSON gem has Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2013-0269-json-gem-has-improper-input-validation-vulnerability) (info, published 24 Oct 2017)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other RubyGems technologies

- [actionpack (RubyGems)](https://junglewise.ai/threats/technologies/actionpack): 77 vulnerabilities
- [nokogiri (RubyGems)](https://junglewise.ai/threats/technologies/nokogiri): 69 vulnerabilities
- [rack (RubyGems)](https://junglewise.ai/threats/technologies/rack): 55 vulnerabilities
- [activerecord (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-activerecord): 26 vulnerabilities
- [rubygems-update (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-update): 25 vulnerabilities
- [puppet (RubyGems)](https://junglewise.ai/threats/technologies/puppet): 23 vulnerabilities
- [activesupport (RubyGems)](https://junglewise.ai/threats/technologies/activesupport): 20 vulnerabilities
- [actionview (RubyGems)](https://junglewise.ai/threats/technologies/actionview): 19 vulnerabilities
- [activestorage (RubyGems)](https://junglewise.ai/threats/technologies/activestorage): 19 vulnerabilities
- [camaleon_cms (RubyGems)](https://junglewise.ai/threats/technologies/camaleon-cms): 19 vulnerabilities
- [rails-html-sanitizer (RubyGems)](https://junglewise.ai/threats/technologies/rails-html-sanitizer): 18 vulnerabilities
- [loofah (RubyGems)](https://junglewise.ai/threats/technologies/loofah): 17 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "json (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/rubygems-json, 13 November 2026.