Arbitrary Command Injection Affecting ruby-libs package, versions <0:3.3.12-8.module+el9.8.0+90984+bac48209


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.43% (35th percentile)

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  • Snyk IDSNYK-ORACLE9-RUBYLIBS-18604759
  • published10 Aug 2026
  • disclosed9 May 2026

Introduced: 9 May 2026

CVE-2026-42257  (opens in a new tab)
CWE-77  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade Oracle:9 ruby-libs to version 0:3.3.12-8.module+el9.8.0+90984+bac48209 or higher.
This issue was patched in ELSA-2026-50828.

NVD Description

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

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS Base Scores

version 3.1