{"id":"UBUNTU-CVE-2026-33210","details":"Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.","modified":"2026-05-20T16:12:47.066887048Z","published":"2026-03-20T23:16:00Z","upstream":["CVE-2026-33210"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33210"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-33210"},{"type":"REPORT","url":"https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3"}],"affected":[{"package":{"name":"ruby-json","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.0-1","1.8.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"1.8.0-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.3-1build1","1.8.3-1build2","1.8.3-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"1.8.3-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.0+dfsg-1","2.1.0+dfsg-1ubuntu2","2.1.0+dfsg-1ubuntu3","2.1.0+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.1.0+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.0+dfsg-2","2.3.0+dfsg-1","2.3.0+dfsg-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.3.0+dfsg-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.0+dfsg-1build1","2.5.1+dfsg-2","2.5.1+dfsg-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.5.1+dfsg-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.3+dfsg-1build2","2.6.3+dfsg-1build3","2.6.3+dfsg-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.6.3+dfsg-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.1+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.9.1+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}},{"package":{"name":"ruby-json","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ruby-json?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.1+dfsg-1","2.15.2+dfsg-1","2.18.1+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-json","binary_version":"2.18.1+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33210.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}