Summary
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.
Fixed packages 22
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | ruby | 3.0.7-167.el9_8 |
| AlmaLinux · 9 | ruby-default-gems | 3.0.7-167.el9_8 |
| AlmaLinux · 9 | ruby-devel | 3.0.7-167.el9_8 |
| AlmaLinux · 9 | ruby-doc | 3.0.7-167.el9_8 |
| AlmaLinux · 9 | ruby-libs | 3.0.7-167.el9_8 |
| AlmaLinux · 9 | rubygem-bigdecimal | 3.0.0-167.el9_8 |
| AlmaLinux · 9 | rubygem-bundler | 2.2.33-167.el9_8 |
| AlmaLinux · 9 | rubygem-io-console | 0.5.7-167.el9_8 |
| AlmaLinux · 9 | rubygem-irb | 1.3.5-167.el9_8 |
| AlmaLinux · 9 | rubygem-json | 2.5.1-167.el9_8 |
| AlmaLinux · 9 | rubygem-minitest | 5.14.2-167.el9_8 |
| AlmaLinux · 9 | rubygem-power_assert | 1.2.1-167.el9_8 |
| AlmaLinux · 9 | rubygem-psych | 3.3.2-167.el9_8 |
| AlmaLinux · 9 | rubygem-rake | 13.0.3-167.el9_8 |
| AlmaLinux · 9 | rubygem-rbs | 1.4.0-167.el9_8 |
| AlmaLinux · 9 | rubygem-rdoc | 6.3.4.1-167.el9_8 |
| AlmaLinux · 9 | rubygem-rexml | 3.2.5-167.el9_8 |
| AlmaLinux · 9 | rubygem-rss | 0.2.9-167.el9_8 |
| AlmaLinux · 9 | rubygem-test-unit | 3.3.7-167.el9_8 |
| AlmaLinux · 9 | rubygem-typeprof | 0.15.2-167.el9_8 |
| AlmaLinux · 9 | rubygems | 3.2.33-167.el9_8 |
| AlmaLinux · 9 | rubygems-devel | 3.2.33-167.el9_8 |
Vulnerabilities 2
-
High 7.6
net-imap vulnerable to STARTTLS stripping via invalid response timing
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issu…
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Medium 5.8
net-imap: Command Injection via unvalidated Symbol inputs
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, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMA…