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 allowduplicatekey: 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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33210.json",
"cwe_ids": [
"CWE-134"
],
"cna_assigner": "GitHub_M"
}{
"extracted_events": [
{
"introduced": "2.14.0"
},
{
"fixed": "2.15.2.1"
},
{
"introduced": "2.16.0"
},
{
"fixed": "2.17.1.2"
},
{
"introduced": "2.18.0"
},
{
"fixed": "2.19.2"
}
],
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:ruby-lang:json:*:*:*:*:*:ruby:*:*"
}