CVE-2026-33210
March 20, 2026
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 Packages
json (RUBY):
Affected version(s) >=2.14.0 <2.15.2.1Fix Suggestion:
Update to version 2.15.2.1json (RUBY):
Affected version(s) >=2.16.0 <2.17.1.2Fix Suggestion:
Update to version 2.17.1.2json (RUBY):
Affected version(s) >=2.18.0 <2.19.2Fix Suggestion:
Update to version 2.19.2Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Use of Externally-Controlled Format String
EPSS
Base Score:
0.02
