CVE-2026-33210

CRITICAL

9.1

CVSS v3

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.

CWE-134

How to fix

Remediation Available

ruby-jsonDebian

Fixed in:2.19.2+dfsg-1CVE-2026-33210

rubyRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.src::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

rubyRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.src::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

ruby-bundled-gemsRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

ruby-bundled-gemsRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

ruby-bundled-gems-debuginfoRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

ruby-bundled-gems-debuginfoRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

ruby-debuginfoRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

ruby-debuginfoRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

ruby-debugsourceRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

ruby-debugsourceRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

ruby-default-gemsRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.noarch::ruby:4.0RHSA-2026:20596

ruby-default-gemsRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.noarch::ruby:4.0RHSA-2026:20596

ruby-develRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

ruby-develRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

ruby-docRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.noarch::ruby:4.0RHSA-2026:20596

ruby-docRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.noarch::ruby:4.0RHSA-2026:20596

ruby-libsRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

ruby-libsRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

ruby-libs-debuginfoRed Hat / RHEL

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

ruby-libs-debuginfoRocky

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.s390x::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.ppc64le::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.i686::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.x86_64::ruby:4.0RHSA-2026:20596

Fixed in:0:4.0.3-32.module+el9.8.0+24280+122d8796.aarch64::ruby:4.0RHSA-2026:20596

ruby4Red Hat / RHEL

Fixed in:0-main@x86_64RHSA-2026:57565

Fixed in:0-main@aarch64RHSA-2026:57565

Fixed in:0-main@srcRHSA-2026:57565

Fixed in:0-main@noarchRHSA-2026:57565

ruby4Rocky

Fixed in:0-main@noarchRHSA-2026:57565

Fixed in:0-main@srcRHSA-2026:57565

Fixed in:0-main@aarch64RHSA-2026:57565

Fixed in:0-main@x86_64RHSA-2026:57565

ruby4.0Rocky

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0Red Hat / RHEL

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0-debuginfoRed Hat / RHEL

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0-debuginfoRocky

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0-debugsourceRocky

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0-debugsourceRed Hat / RHEL

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

ruby4.0-develRed Hat / RHEL

Fixed in:0:4.0.3-34.el10_2RHSA-2026:20606

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploit Intelligence

0.86%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Vendor Advisory1

github.com

Other references6

Related Vulnerabilities

Other CWE-134 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13160	Critical	9.8	81%	-	Fix
CVE-2023-22374	High	8.5	73%	-	-
CVE-2012-1851	High	10.0	66%	-	-
CVE-2024-23113	Critical	9.8	62%	KEV	-
CVE-2012-3569	High	9.3	48%	-	-
CVE-2019-1579	High	8.1	46%	KEV + Ransom	Fix

Common questions

How do I fix CVE-2026-33210?

Published advisories record a fix for 105 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-33210 being actively exploited?

Not that we know of. CVE-2026-33210 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.86% is the estimated probability that it will be exploited in the next 30 days. That is higher than 56% of all scored CVEs.

How severe is CVE-2026-33210?

CVE-2026-33210 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-33210 affect?

Published advisories record a fix for ruby-json (Debian), ruby (Red Hat / RHEL), ruby (Rocky), ruby-bundled-gems (Rocky), and 101 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-33210

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-21.