Protection Mechanism Failure Affecting rubygem-mysql2-debuginfo package, versions <0:0.5.5-1.module+el8.10.0+1679+61871737


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
1.31% (70th percentile)

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  • Snyk IDSNYK-ROCKY8-RUBYGEMMYSQL2DEBUGINFO-16881591
  • published27 May 2026
  • disclosed24 Apr 2026

Introduced: 24 Apr 2026

CVE-2026-41316  (opens in a new tab)
CWE-693  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 rubygem-mysql2-debuginfo to version 0:0.5.5-1.module+el8.10.0+1679+61871737 or higher.
This issue was patched in RLSA-2026:20614.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rubygem-mysql2-debuginfo package and not the rubygem-mysql2-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

ERB is a templating system for Ruby. Ruby 2.7.0 (before ERB 2.2.0 was published on rubygems.org) introduced an @_init instance variable guard in ERB#result and ERB#run to prevent code execution when an ERB object is reconstructed via Marshal.load (deserialization). However, three other public methods that also evaluate @src via eval() were not given the same guard: ERB#def_method, ERB#def_module, and ERB#def_class. An attacker who can trigger Marshal.load on untrusted data in a Ruby application that has erb loaded can use ERB#def_module (zero-arg, default parameters) as a code execution sink, bypassing the @_init protection entirely. ERB 4.0.3.1, 4.0.4.1, 6.0.1.1, and 6.0.4 patch the issue.

CVSS Base Scores

version 3.1