CVE-2026-33210

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 v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3	Mitigation Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:20596
https://access.redhat.com/errata/RHSA-2026:20606
https://access.redhat.com/errata/RHSA-2026:57565
https://access.redhat.com/security/cve/CVE-2026-33210
https://bugzilla.redhat.com/show_bug.cgi?id=2449871
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33210.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:ruby-lang:json::::::ruby::*
	cpe:2.3:a:ruby-lang:json::::::ruby::*
	cpe:2.3:a:ruby-lang:json::::::ruby::*

History

No history.

Information

Published : 2026-03-20 23:16

Updated : 2026-08-21 13:17

NVD link : CVE-2026-33210

Mitre link : CVE-2026-33210

CVE.ORG link : CVE-2026-33210

JSON object : View

Products Affected

ruby-lang

json

CWE

CWE-134

Use of Externally-Controlled Format String

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"pcs", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "ruby:3.3/ruby", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "ruby:3.3/ruby", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux_ai:3"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AI (RHEL AI) 3", "packageName": "json", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}]}], "published": "2026-03-20T23:16:46.010", "references": [{"url": 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"value": "CWE-134"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-134"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Ruby JSON es una implementaci\u00f3n de JSON para Ruby. Desde la versi\u00f3n 2.14.0 hasta antes de las versiones 2.15.2.1, 2.17.1.2 y 2.19.2, una vulnerabilidad de inyecci\u00f3n de cadena de formato puede llevar a ataques de denegaci\u00f3n de servicio o revelaci\u00f3n de informaci\u00f3n, cuando la opci\u00f3n de an\u00e1lisis allow_duplicate_key: false se utiliza para analizar documentos proporcionados por el usuario. Este problema ha sido parcheado en las versiones 2.15.2.1, 2.17.1.2 y 2.19.2."}], "lastModified": "2026-08-21T13:17:24.320", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ruby-lang:json:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "3F2AC3C1-58ED-41B9-B126-0FF2E3D8CAC1", "versionEndExcluding": "2.15.2.1", "versionStartIncluding": "2.14.0"}, {"criteria": "cpe:2.3:a:ruby-lang:json:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "D822BD02-FB8E-41D7-BD9A-2A166B343A81", "versionEndExcluding": "2.17.1.2", "versionStartIncluding": "2.16.0"}, {"criteria": "cpe:2.3:a:ruby-lang:json:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "C264EF03-AD00-430B-BAD6-85D5F56787CF", "versionEndExcluding": "2.19.2", "versionStartIncluding": "2.18.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}