RHSA-2026:37397: Important: ruby security update

Published Jul 9, 2026
·
Updated

Important: ruby security update

Other sources

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.Security Fix(es): ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258) net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS (CVE-2026-42246) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

— Red Hat

Affected Software

38 affected componentsFixes available
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian
redhat/ruby<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-debuginfo<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-debuginfo<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-devel<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-doc<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-irb<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-libs<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-libs<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-tcltk<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/rubygem-bigdecimal<1.2.0-39.el7_9.1
1.2.0-39.el7_9.1
redhat/rubygem-io-console<0.4.2-39.el7_9.1
0.4.2-39.el7_9.1
redhat/rubygem-json<1.7.7-39.el7_9.1
1.7.7-39.el7_9.1
redhat/rubygem-minitest<4.3.2-39.el7_9.1
4.3.2-39.el7_9.1
redhat/rubygem-psych<2.0.0-39.el7_9.1
2.0.0-39.el7_9.1
redhat/rubygem-rake<0.9.6-39.el7_9.1
0.9.6-39.el7_9.1
redhat/rubygem-rdoc<4.0.0-39.el7_9.1
4.0.0-39.el7_9.1
redhat/rubygems<2.0.14.1-39.el7_9.1
2.0.14.1-39.el7_9.1
redhat/rubygems-devel<2.0.14.1-39.el7_9.1
2.0.14.1-39.el7_9.1
redhat/ruby-devel<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-tcltk<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/rubygem-bigdecimal<1.2.0-39.el7_9.1
1.2.0-39.el7_9.1
redhat/rubygem-io-console<0.4.2-39.el7_9.1
0.4.2-39.el7_9.1
redhat/rubygem-json<1.7.7-39.el7_9.1
1.7.7-39.el7_9.1
redhat/rubygem-psych<2.0.0-39.el7_9.1
2.0.0-39.el7_9.1
redhat/ruby<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-debuginfo<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-devel<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-libs<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/ruby-tcltk<2.0.0.648-39.el7_9.1
2.0.0.648-39.el7_9.1
redhat/rubygem-bigdecimal<1.2.0-39.el7_9.1
1.2.0-39.el7_9.1
redhat/rubygem-io-console<0.4.2-39.el7_9.1
0.4.2-39.el7_9.1
redhat/rubygem-json<1.7.7-39.el7_9.1
1.7.7-39.el7_9.1
redhat/rubygem-psych<2.0.0-39.el7_9.1
2.0.0-39.el7_9.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/ruby-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  2. Upgrade

    Upgrade redhat/ruby-devel to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  3. Upgrade

    Upgrade redhat/ruby-doc to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  4. Upgrade

    Upgrade redhat/ruby-tcltk to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  5. Upgrade

    Upgrade redhat/rubygem-minitest to a version that resolves this vulnerability.

    Fixed in 4.3.2-39.el7_9.1
  6. Upgrade

    Upgrade redhat/rubygem-rake to a version that resolves this vulnerability.

    Fixed in 0.9.6-39.el7_9.1
  7. Upgrade

    Upgrade redhat/rubygems-devel to a version that resolves this vulnerability.

    Fixed in 2.0.14.1-39.el7_9.1
  8. Upgrade

    Upgrade redhat/ruby to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  9. Upgrade

    Upgrade redhat/ruby-irb to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  10. Upgrade

    Upgrade redhat/ruby-libs to a version that resolves this vulnerability.

    Fixed in 2.0.0.648-39.el7_9.1
  11. Upgrade

    Upgrade redhat/rubygem-bigdecimal to a version that resolves this vulnerability.

    Fixed in 1.2.0-39.el7_9.1
  12. Upgrade

    Upgrade redhat/rubygem-io-console to a version that resolves this vulnerability.

    Fixed in 0.4.2-39.el7_9.1
  13. Upgrade

    Upgrade redhat/rubygem-json to a version that resolves this vulnerability.

    Fixed in 1.7.7-39.el7_9.1
  14. Upgrade

    Upgrade redhat/rubygem-psych to a version that resolves this vulnerability.

    Fixed in 2.0.0-39.el7_9.1
  15. Upgrade

    Upgrade redhat/rubygem-rdoc to a version that resolves this vulnerability.

    Fixed in 4.0.0-39.el7_9.1
  16. Upgrade

    Upgrade redhat/rubygems to a version that resolves this vulnerability.

    Fixed in 2.0.14.1-39.el7_9.1

Event History

Jul 9, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·05:02 PM
Data Sourced
via Red Hat·05:02 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:37397?

The severity of RHSA-2026:37397 is high, rated at 7.

2

What vulnerabilities are addressed in RHSA-2026:37397?

RHSA-2026:37397 addresses a command injection vulnerability in ruby/net-imap, specifically CVE-2026-42258.

3

How do I fix RHSA-2026:37397?

To fix RHSA-2026:37397, update to the latest version of Ruby as specified in the security advisory.

4

Which software packages are affected by RHSA-2026:37397?

The affected software packages include redhat/ruby, redhat/ruby-debuginfo, redhat/ruby-devel, redhat/ruby-libs, redhat/ruby-tcltk, redhat/rubygem-bigdecimal, redhat/rubygem-io-console, and redhat/rubygem-json.

5

What is CVE-2026-42258 in relation to RHSA-2026:37397?

CVE-2026-42258 is an IMAP command injection vulnerability that can occur via symbolic arguments in the ruby/net-imap library.

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