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CVE-2026-33210

CVE-2026-33210 · Ruby JSON has a format string injection vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.3 · High · EPSS 0.9% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • json

    Versions
    • >= 2.14.0, < 2.15.2.1: Affected
    • >= 2.16.0, < 2.17.1.2: Affected
    • >= 2.18.0, < 2.19.2: Affected

    No fix published

  • ruby-json Debian:14

    Versions
    • 2.15.2+dfsg-1
    • 2.18.1+dfsg-1
    • 2.19.1+dfsg-1
    • 2.9.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: < 2.19.2+dfsg-1

    Update to 2.19.2+dfsg-1

  • ruby-json Ubuntu:14.04:LTS

    Versions
    • 1.8.0-1
    • 1.8.0-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:16.04:LTS

    Versions
    • 1.8.3-1build1
    • 1.8.3-1build2
    • 1.8.3-1build4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:18.04:LTS

    Versions
    • 2.1.0+dfsg-1
    • 2.1.0+dfsg-1ubuntu2
    • 2.1.0+dfsg-1ubuntu3
    • 2.1.0+dfsg-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:20.04:LTS

    Versions
    • 2.1.0+dfsg-2
    • 2.3.0+dfsg-1
    • 2.3.0+dfsg-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:22.04:LTS

    Versions
    • 2.3.0+dfsg-1build1
    • 2.5.1+dfsg-2
    • 2.5.1+dfsg-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:24.04:LTS

    Versions
    • 2.6.3+dfsg-1build2
    • 2.6.3+dfsg-1build3
    • 2.6.3+dfsg-1build4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:25.10

    Versions
    • 2.9.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:26.10

    Versions
    • 2.18.1+dfsg-1
    • 2.21.1+dfsg-1
    • 2.21.2+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ruby-json Ubuntu:26.04:LTS

    Versions
    • 2.9.1+dfsg-1
    • 2.15.2+dfsg-1
    • 2.18.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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