CVE-2026-33210 | 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.
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.
- 🔗 github.com/ruby/json/security/advisories/GHSA-3m6g-2…
- 🔗 access.redhat.com/errata/RHSA-2026:20596
- 🔗 access.redhat.com/errata/RHSA-2026:20606
- 🔗 access.redhat.com/errata/RHSA-2026:57565
- 🔗 access.redhat.com/security/cve/CVE-2026-33210
- 🔗 bugzilla.redhat.com/show_bug.cgi
- 🔗 security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33210.json
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| Tier | 2026-08-29 | 2026-09-06 |
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| ≥50 % | 4 | 0 |
| ≥10 % | 3 | 0 |
| <10 % | 304 | 300 |
CVE-2026-33210 | 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.
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_dupl