CVE-2026-33210
Last modified
CVE-2026-33210 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. 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. EPSS estimates a 0.55% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Json | >= 2.14.0, < 2.15.2.1 |
| Ruby-Lang | Json | >= 2.16.0, < 2.17.1.2 |
| Ruby-Lang | Json | >= 2.18.0, < 2.19.2 |
References
- https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-33210?
How severe is CVE-2026-33210?
How do I fix CVE-2026-33210?
Are you affected by CVE-2026-33210?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST