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CVE-2026-33210

Medium

Elevated severity or exploit probability.

CVSS base
9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS — probability of exploitation (30 days)
1.0%
61.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-134
Published 2026-03-20 · modified 2026-08-21

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.

Affected

ruby-lang

References

Official: NVD · CVE.org