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CVE-2026-33210 Ruby JSON has a format string injection vulnerability

🗓️ 20 Mar 2026 22:57:08Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 22 Views

Ruby JSON format string injection can cause denial of service or data disclosure when allow_duplicate_key is false.

Related
Affected
Refs
[
  {
    "vendor": "ruby",
    "product": "json",
    "versions": [
      {
        "version": ">= 2.14.0, < 2.15.2.1",
        "status": "affected"
      },
      {
        "version": ">= 2.16.0, < 2.17.1.2",
        "status": "affected"
      },
      {
        "version": ">= 2.18.0, < 2.19.2",
        "status": "affected"
      }
    ]
  }
]

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20 Mar 2026 22:57Current
CVSS 48.3
EPSS0.00038
22