Use of Externally-Controlled Format String Affecting ruby:4.0/rubygems-devel package, versions <0:4.0.6-32.module_el9.8.0+251+5fdbd96b


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.87% (59th percentile)

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  • Snyk IDSNYK-ALMALINUX9-RUBY-16960755
  • published28 May 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-33210  (opens in a new tab)
CWE-134  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 ruby:4.0/rubygems-devel to version 0:4.0.6-32.module_el9.8.0+251+5fdbd96b or higher.
This issue was patched in ALSA-2026:20596.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby:4.0/rubygems-devel package and not the ruby:4.0/rubygems-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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 Base Scores

version 3.1