CVE-2026-33210 — Use of Externally-Controlled Format String in Json
Severity
8.3HIGHNVD
EPSS
0.0%
top 92.58%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 20
Latest updateMar 21
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 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
Affected Packages3 packages
🔴Vulnerability Details
4📋Vendor Advisories
2🕵️Threat Intelligence
1💬Community
1Bugzilla▶
CVE-2026-33210 ruby/json: Ruby JSON: Denial of Service or Information Disclosure via format string injection↗2026-03-21