CVE-2026-54696
Fixed in a distro release EPSS <1%CVSS 3.7
Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.
Products: ruby json
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| RubyGems | json | 2.19.9 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | cinc-auditor | 7.1.7-r7 |
| Chainguard | commercial-gitlab-rails-ee-19.1 | no fix |
| Chainguard | commercial-gitlab-rails-ee-19.2 | 19.2.7-r4 |
| Chainguard | commercial-gitlab-rails-ee-fips-19.1 | no fix |
| Chainguard | commercial-gitlab-rails-ee-fips-19.2 | 19.2.7-r4 |
| Chainguard | gitlab-rails-ce-18.1 | no fix |
| Chainguard | gitlab-rails-ce-18.10 | no fix |
| Chainguard | gitlab-rails-ce-18.11 | no fix |
| Chainguard | gitlab-rails-ce-18.6 | no fix |
| Chainguard | gitlab-rails-ce-18.7 | no fix |
| Chainguard | gitlab-rails-ce-18.8 | no fix |
| Chainguard | gitlab-rails-ce-18.9 | no fix |
| Chainguard | gitlab-rails-ce-19.0 | no fix |
| Chainguard | gitlab-rails-ce-19.1 | no fix |
| Chainguard | gitlab-rails-ce-19.2 | no fix |
| Chainguard | gitlab-rails-ce-19.3 | 19.3.1-r6 |
| Chainguard | gitlab-rails-ce-fips-18.1 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.10 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.11 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.6 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.7 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.8 | no fix |
| Chainguard | gitlab-rails-ce-fips-18.9 | no fix |
| Chainguard | gitlab-rails-ce-fips-19.0 | no fix |
| Chainguard | gitlab-rails-ce-fips-19.1 | no fix |
| Chainguard | gitlab-rails-ce-fips-19.2 | no fix |
| Chainguard | gitlab-rails-ce-fips-19.3 | 19.3.1-r3 |
| Chainguard | jruby-10.1 | 0 |
| Chainguard | logstash-8.19 | 8.19.19-r3 |
| Chainguard | logstash-8.19-iamguarded-compat | 8.19.19-r3 |
| Chainguard | logstash-8.19-with-output-opensearch | 8.19.19-r3 |
| Chainguard | logstash-9.2 | 9.2.8-r5 |
| Chainguard | logstash-9.2-iamguarded-compat | 9.2.8-r5 |
| Chainguard | logstash-9.2-with-output-opensearch | 9.2.8-r5 |
| Chainguard | pact-broker-docker | 2.141.0.2.119.0-r2 |
| Chainguard | pghero | 3.8.0-r6 |
| Chainguard | pghero-fips | 3.8.0-r5 |
| Chainguard | ruby-3.4 | no fix |
| Chainguard | ruby3.2-fluentd-kubernetes-daemonset-1.19-kinesis | 1.19.2.1.1-r6 |
| Chainguard | ruby3.2-kube-logging-operator-fluentd-outputs | 6.7.0-r8 |
| Chainguard | ruby3.4-kube-logging-operator-fluentd-outputs | 6.7.0-r8 |
| Chainguard | truffleruby | 0 |
| Debian 13 | ruby-json | no fix |
| Debian 14 | ruby-json | 2.19.9+dfsg-1 |
| Red Hat hummingbird 1 | ruby3.4 | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby3.4-bundled-gems | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby3.4-default-gems | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby3.4-devel | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby3.4-doc | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby3.4-libs | 0:3.4.10-31.5.hum1 |
| Red Hat hummingbird 1 | ruby4.0 | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | ruby4.0-bundled-gems | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | ruby4.0-default-gems | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | ruby4.0-devel | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | ruby4.0-doc | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | ruby4.0-libs | 0:4.0.6-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-bigdecimal | 0:4.0.1-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-bundler | 0:4.0.16-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-devel | 0:4.0.16-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-io-console | 0:0.8.2-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-irb | 0:1.16.0-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-json | 0:2.18.0-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-minitest | 0:6.0.0-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-power_assert | 0:3.0.1-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-psych | 0:5.3.1-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-racc | 0:1.8.1-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rake | 0:13.3.1-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rbs | 0:3.10.0-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rdoc | 0:7.0.4-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rexml | 0:3.4.4-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rss | 0:0.3.2-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-rubygems | 0:4.0.16-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-test-unit | 0:3.7.5-37.1.hum1 |
| Red Hat hummingbird 1 | rubygem4.0-typeprof | 0:0.31.1-37.1.hum1 |
| Ubuntu 14.04 LTS | ruby-json | no fix |
| Ubuntu 16.04 LTS | jruby | no fix |
| Ubuntu 16.04 LTS | ruby-json | no fix |
| Ubuntu 18.04 LTS | jruby | no fix |
| Ubuntu 18.04 LTS | ruby-json | no fix |
| Ubuntu 20.04 LTS | jruby | no fix |
| Ubuntu 20.04 LTS | ruby-json | no fix |
| Ubuntu 22.04 LTS | ruby-json | no fix |
| Ubuntu 22.04 LTS | ruby3.0 | no fix |
| Ubuntu 24.04 LTS | jruby | no fix |
| Ubuntu 24.04 LTS | ruby-json | no fix |
| Ubuntu 24.04 LTS | ruby3.2 | no fix |
| Ubuntu 25.10 | jruby | no fix |
| Ubuntu 25.10 | ruby-json | no fix |
| Ubuntu 25.10 | ruby3.3 | no fix |
| Ubuntu 26.04 LTS | jruby | no fix |
| Ubuntu 26.04 LTS | ruby-json | no fix |
| Ubuntu 26.04 LTS | ruby3.3 | no fix |
| Ubuntu 26.10 | jruby | no fix |
| Ubuntu 26.10 | ruby-json | no fix |
| Ubuntu 26.10 | ruby3.3 | no fix |
| Ubuntu Pro 14.04 LTS | jruby | no fix |
| Ubuntu Pro 16.04 LTS | ruby2.3 | no fix |
| Ubuntu Pro 18.04 LTS | ruby2.5 | no fix |
| Ubuntu Pro 20.04 LTS | ruby2.7 | no fix |
| Wolfi | cinc-auditor | 7.1.7-r7 |
| Wolfi | jruby-10.1 | 0 |
| Wolfi | ruby-3.4 | no fix |
| Wolfi | ruby3.2-fluentd-kubernetes-daemonset-1.19-kinesis | 1.19.2.1.1-r6 |
| Wolfi | ruby3.2-kube-logging-operator-fluentd-outputs | 6.7.0-r8 |
| Wolfi | ruby3.4-kube-logging-operator-fluentd-outputs | 6.7.0-r8 |