{"cve":"CVE-2026-33210","nvd":{"published":"2026-03-20T23:16:46.010","modified":"2026-08-21T13:17:24.320","status":"Modified","description":"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.","cvss_v4":{"vector":"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","score":8.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1},"cwes":["CWE-134"],"references":["https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3","https://access.redhat.com/errata/RHSA-2026:20596","https://access.redhat.com/errata/RHSA-2026:20606","https://access.redhat.com/errata/RHSA-2026:57565","https://access.redhat.com/security/cve/CVE-2026-33210"],"products":["ruby-lang:json"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33210","score":0.00872,"percentile":0.589,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3m6g-2423-7cp3","url":"https://osv.dev/vulnerability/GHSA-3m6g-2423-7cp3","summary":"Ruby JSON has a format string injection vulnerability","modified":"2026-09-10T03:50:36.800078304Z","packages":[{"ecosystem":"RubyGems","name":"json","purl":"pkg:gem/json","ranges":[">=2.18.0 <2.19.2"],"fixed":["2.19.2"]},{"ecosystem":"RubyGems","name":"json","purl":"pkg:gem/json","ranges":[">=2.16.0 <2.17.1.2"],"fixed":["2.17.1.2"]},{"ecosystem":"RubyGems","name":"json","purl":"pkg:gem/json","ranges":[">=2.14.0 <2.15.2.1"],"fixed":["2.15.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}