Use of Externally-Controlled Format String Affecting ruby4.0-devel package, versions <0:4.0.3-34.el10_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.55% (42nd percentile)

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  • Snyk IDSNYK-RHEL10-RUBY40DEVEL-16879949
  • published27 May 2026
  • disclosed20 Mar 2026

Introduced: 20 Mar 2026

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

How to fix?

Upgrade RHEL:10 ruby4.0-devel to version 0:4.0.3-34.el10_2 or higher.
This issue was patched in RHSA-2026:20606.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby4.0-devel package and not the ruby4.0-devel package as distributed by RHEL. See How to fix? for RHEL:10 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