GHSA-3m6g-2423-7cp3

    Dashboard / Vulnerabilities / GHSA-3m6g-2423-7cp3

    GHSA-3m6g-2423-7cp3

    Published: 19 Mar 2026Last Modified: 10 Sept 2026

    Summary: Ruby JSON has a format string injection vulnerability

    Details: ### Impact A format string injection vulnerability than that 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 option isn't the default, if you didn't opt-in to use it, you are not impacted. ### Patches Patched in `2.19.2`. ### Workarounds The issue can be avoided by not using the `allow_duplicate_key: false` parsing option.

    References: https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3, https://nvd.nist.gov/vuln/detail/CVE-2026-33210, https://github.com/ruby/json, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/json/CVE-2026-33210.yml

    Affected packages

    Package

    Name: json

    Purl: pkg:gem/json

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 2.18.0
    Fixed -2.19.2

    Affected versions

    2.18.0
    2.18.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High