Improper Neutralization Affecting ruby:3.3/ruby-devel package, versions <0:3.3.12-8.module_el8.10.0+4241+4264e34b


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.38% (30th percentile)

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  • Snyk IDSNYK-ALMALINUX8-RUBY-19821747
  • published15 Sept 2026
  • disclosed5 Aug 2026

Introduced: 5 Aug 2026

CVE-2026-47241  (opens in a new tab)
CWE-162  (opens in a new tab)
CWE-182  (opens in a new tab)
CWE-186  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 ruby:3.3/ruby-devel to version 0:3.3.12-8.module_el8.10.0+4241+4264e34b or higher.
This issue was patched in ALSA-2026:50728.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby:3.3/ruby-devel package and not the ruby:3.3/ruby-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS Base Scores

version 3.1