RHSA-2026:35866: Important: ruby:2.5 security update

Published Jul 6, 2026
·
Updated

Important: ruby:2.5 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

68 affected componentsFixes available
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension
redhat/ruby<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-abrt<0.3.0-4.module+el8.1.0+3656+f80bfa1d
0.3.0-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bson<4.3.0-2.module+el8.1.0+3656+f80bfa1d
4.3.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bundler<1.16.1-4.module+el8.4.0+14083+f9ece6dd
1.16.1-4.module+el8.4.0+14083+f9ece6dd
redhat/rubygem-mongo<2.5.1-2.module+el8.1.0+3656+f80bfa1d
2.5.1-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mysql2<0.4.10-4.module+el8.1.0+3656+f80bfa1d
0.4.10-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-pg<1.0.0-2.module+el8.1.0+3656+f80bfa1d
1.0.0-2.module+el8.1.0+3656+f80bfa1d
redhat/ruby<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-debuginfo<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-debuginfo<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-debugsource<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-debugsource<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-devel<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-devel<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-doc<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-irb<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-libs<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-libs<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-libs-debuginfo<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/ruby-libs-debuginfo<2.5.9-109.module+el8.4.0+24479+aaeed2c5
2.5.9-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-abrt<0.3.0-4.module+el8.1.0+3656+f80bfa1d
0.3.0-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-abrt-doc<0.3.0-4.module+el8.1.0+3656+f80bfa1d
0.3.0-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bigdecimal<1.3.4-109.module+el8.4.0+24479+aaeed2c5
1.3.4-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-bigdecimal<1.3.4-109.module+el8.4.0+24479+aaeed2c5
1.3.4-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-bigdecimal-debuginfo<1.3.4-109.module+el8.4.0+24479+aaeed2c5
1.3.4-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-bigdecimal-debuginfo<1.3.4-109.module+el8.4.0+24479+aaeed2c5
1.3.4-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-bson<4.3.0-2.module+el8.1.0+3656+f80bfa1d
4.3.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bson-debuginfo<4.3.0-2.module+el8.1.0+3656+f80bfa1d
4.3.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bson-debugsource<4.3.0-2.module+el8.1.0+3656+f80bfa1d
4.3.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bson-doc<4.3.0-2.module+el8.1.0+3656+f80bfa1d
4.3.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-bundler<1.16.1-4.module+el8.4.0+14083+f9ece6dd
1.16.1-4.module+el8.4.0+14083+f9ece6dd
redhat/rubygem-bundler-doc<1.16.1-4.module+el8.4.0+14083+f9ece6dd
1.16.1-4.module+el8.4.0+14083+f9ece6dd
redhat/rubygem-io-console<0.4.6-109.module+el8.4.0+24479+aaeed2c5
0.4.6-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-io-console<0.4.6-109.module+el8.4.0+24479+aaeed2c5
0.4.6-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-io-console-debuginfo<0.4.6-109.module+el8.4.0+24479+aaeed2c5
0.4.6-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-io-console-debuginfo<0.4.6-109.module+el8.4.0+24479+aaeed2c5
0.4.6-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-json<2.1.0-109.module+el8.4.0+24479+aaeed2c5
2.1.0-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-json<2.1.0-109.module+el8.4.0+24479+aaeed2c5
2.1.0-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-json-debuginfo<2.1.0-109.module+el8.4.0+24479+aaeed2c5
2.1.0-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-json-debuginfo<2.1.0-109.module+el8.4.0+24479+aaeed2c5
2.1.0-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-minitest<5.10.3-109.module+el8.4.0+24479+aaeed2c5
5.10.3-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-mongo<2.5.1-2.module+el8.1.0+3656+f80bfa1d
2.5.1-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mongo-doc<2.5.1-2.module+el8.1.0+3656+f80bfa1d
2.5.1-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mysql2<0.4.10-4.module+el8.1.0+3656+f80bfa1d
0.4.10-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mysql2-debuginfo<0.4.10-4.module+el8.1.0+3656+f80bfa1d
0.4.10-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mysql2-debugsource<0.4.10-4.module+el8.1.0+3656+f80bfa1d
0.4.10-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-mysql2-doc<0.4.10-4.module+el8.1.0+3656+f80bfa1d
0.4.10-4.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-net-telnet<0.1.1-109.module+el8.4.0+24479+aaeed2c5
0.1.1-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-openssl<2.1.2-109.module+el8.4.0+24479+aaeed2c5
2.1.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-openssl<2.1.2-109.module+el8.4.0+24479+aaeed2c5
2.1.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-openssl-debuginfo<2.1.2-109.module+el8.4.0+24479+aaeed2c5
2.1.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-openssl-debuginfo<2.1.2-109.module+el8.4.0+24479+aaeed2c5
2.1.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-pg<1.0.0-2.module+el8.1.0+3656+f80bfa1d
1.0.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-pg-debuginfo<1.0.0-2.module+el8.1.0+3656+f80bfa1d
1.0.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-pg-debugsource<1.0.0-2.module+el8.1.0+3656+f80bfa1d
1.0.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-pg-doc<1.0.0-2.module+el8.1.0+3656+f80bfa1d
1.0.0-2.module+el8.1.0+3656+f80bfa1d
redhat/rubygem-psych<3.0.2-109.module+el8.4.0+24479+aaeed2c5
3.0.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-psych<3.0.2-109.module+el8.4.0+24479+aaeed2c5
3.0.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-psych-debuginfo<3.0.2-109.module+el8.4.0+24479+aaeed2c5
3.0.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-psych-debuginfo<3.0.2-109.module+el8.4.0+24479+aaeed2c5
3.0.2-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-rake<12.3.3-109.module+el8.4.0+24479+aaeed2c5
12.3.3-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-rdoc<6.0.1.1-109.module+el8.4.0+24479+aaeed2c5
6.0.1.1-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-test-unit<3.2.7-109.module+el8.4.0+24479+aaeed2c5
3.2.7-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygem-xmlrpc<0.3.0-109.module+el8.4.0+24479+aaeed2c5
0.3.0-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygems<2.7.6.3-109.module+el8.4.0+24479+aaeed2c5
2.7.6.3-109.module+el8.4.0+24479+aaeed2c5
redhat/rubygems-devel<2.7.6.3-109.module+el8.4.0+24479+aaeed2c5
2.7.6.3-109.module+el8.4.0+24479+aaeed2c5

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  2. Upgrade

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

    Fixed in 0.3.0-4.module+el8.1.0+3656+f80bfa1d
  3. Upgrade

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

    Fixed in 4.3.0-2.module+el8.1.0+3656+f80bfa1d
  4. Upgrade

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

    Fixed in 1.16.1-4.module+el8.4.0+14083+f9ece6dd
  5. Upgrade

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

    Fixed in 2.5.1-2.module+el8.1.0+3656+f80bfa1d
  6. Upgrade

    Upgrade redhat/rubygem-mysql2 to a version that resolves this vulnerability.

    Fixed in 0.4.10-4.module+el8.1.0+3656+f80bfa1d
  7. Upgrade

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

    Fixed in 1.0.0-2.module+el8.1.0+3656+f80bfa1d
  8. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  9. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  10. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  11. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  12. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  13. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  14. Upgrade

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

    Fixed in 2.5.9-109.module+el8.4.0+24479+aaeed2c5
  15. Upgrade

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

    Fixed in 0.3.0-4.module+el8.1.0+3656+f80bfa1d
  16. Upgrade

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

    Fixed in 1.3.4-109.module+el8.4.0+24479+aaeed2c5
  17. Upgrade

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

    Fixed in 1.3.4-109.module+el8.4.0+24479+aaeed2c5
  18. Upgrade

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

    Fixed in 4.3.0-2.module+el8.1.0+3656+f80bfa1d
  19. Upgrade

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

    Fixed in 4.3.0-2.module+el8.1.0+3656+f80bfa1d
  20. Upgrade

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

    Fixed in 4.3.0-2.module+el8.1.0+3656+f80bfa1d
  21. Upgrade

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

    Fixed in 1.16.1-4.module+el8.4.0+14083+f9ece6dd
  22. Upgrade

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

    Fixed in 0.4.6-109.module+el8.4.0+24479+aaeed2c5
  23. Upgrade

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

    Fixed in 0.4.6-109.module+el8.4.0+24479+aaeed2c5
  24. Upgrade

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

    Fixed in 2.1.0-109.module+el8.4.0+24479+aaeed2c5
  25. Upgrade

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

    Fixed in 2.1.0-109.module+el8.4.0+24479+aaeed2c5
  26. Upgrade

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

    Fixed in 5.10.3-109.module+el8.4.0+24479+aaeed2c5
  27. Upgrade

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

    Fixed in 2.5.1-2.module+el8.1.0+3656+f80bfa1d
  28. Upgrade

    Upgrade redhat/rubygem-mysql2-debuginfo to a version that resolves this vulnerability.

    Fixed in 0.4.10-4.module+el8.1.0+3656+f80bfa1d
  29. Upgrade

    Upgrade redhat/rubygem-mysql2-debugsource to a version that resolves this vulnerability.

    Fixed in 0.4.10-4.module+el8.1.0+3656+f80bfa1d
  30. Upgrade

    Upgrade redhat/rubygem-mysql2-doc to a version that resolves this vulnerability.

    Fixed in 0.4.10-4.module+el8.1.0+3656+f80bfa1d
  31. Upgrade

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

    Fixed in 0.1.1-109.module+el8.4.0+24479+aaeed2c5
  32. Upgrade

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

    Fixed in 2.1.2-109.module+el8.4.0+24479+aaeed2c5
  33. Upgrade

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

    Fixed in 2.1.2-109.module+el8.4.0+24479+aaeed2c5
  34. Upgrade

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

    Fixed in 1.0.0-2.module+el8.1.0+3656+f80bfa1d
  35. Upgrade

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

    Fixed in 1.0.0-2.module+el8.1.0+3656+f80bfa1d
  36. Upgrade

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

    Fixed in 1.0.0-2.module+el8.1.0+3656+f80bfa1d
  37. Upgrade

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

    Fixed in 3.0.2-109.module+el8.4.0+24479+aaeed2c5
  38. Upgrade

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

    Fixed in 3.0.2-109.module+el8.4.0+24479+aaeed2c5
  39. Upgrade

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

    Fixed in 12.3.3-109.module+el8.4.0+24479+aaeed2c5
  40. Upgrade

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

    Fixed in 6.0.1.1-109.module+el8.4.0+24479+aaeed2c5
  41. Upgrade

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

    Fixed in 3.2.7-109.module+el8.4.0+24479+aaeed2c5
  42. Upgrade

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

    Fixed in 0.3.0-109.module+el8.4.0+24479+aaeed2c5
  43. Upgrade

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

    Fixed in 2.7.6.3-109.module+el8.4.0+24479+aaeed2c5
  44. Upgrade

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

    Fixed in 2.7.6.3-109.module+el8.4.0+24479+aaeed2c5
  45. Upgrade

    Upgrade ruby/net-imap to a version that resolves this vulnerability.

    Fixed in 2.5Patch CVE-2026-42246
  46. Upgrade

    Upgrade ruby/net-imap to a version that resolves this vulnerability.

    Fixed in 2.5Patch CVE-2026-42258

Event History

Jul 6, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·06:23 AM
Data Sourced
via Red Hat·06:23 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:35866?

The severity of RHSA-2026:35866 is classified as high with a score of 7.

2

How do I fix RHSA-2026:35866?

To fix RHSA-2026:35866, update your Ruby packages to the latest version provided by Red Hat.

3

What vulnerabilities are addressed in RHSA-2026:35866?

RHSA-2026:35866 addresses a command injection vulnerability in ruby/net-imap related to IMAP command injection via symbol arguments.

4

What software is affected by RHSA-2026:35866?

The affected software includes ruby, rubygem-abrt, rubygem-bson, rubygem-bundler, rubygem-mongo, rubygem-mysql2, and rubygem-pg.

5

When was RHSA-2026:35866 published?

RHSA-2026:35866 was published on July 6, 2026.

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