Inefficient Regular Expression Complexity Affecting ruby:3.1/ruby-doc package, versions <0:3.1.7-145.module_el8.10.0+3984+cf55e3df


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.76% (54th percentile)

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  • Snyk IDSNYK-ALMALINUX8-RUBY-16012571
  • published13 Apr 2026
  • disclosed22 Apr 2025

Introduced: 22 Apr 2025

CVE-2025-27220  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 ruby:3.1/ruby-doc to version 0:3.1.7-145.module_el8.10.0+3984+cf55e3df or higher.
This issue was patched in ALSA-2025:4063.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby:3.1/ruby-doc package and not the ruby:3.1/ruby-doc package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.

CVSS Base Scores

version 3.1