ALSA-2026:50773

Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.

Security Fix(es):

• zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)
• net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)
• ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)
• net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)
• net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)
• net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

Bug Fix(es) and Enhancement(s):

• ruby4.0: Rebase to the latest Ruby 4.0 release [almalinux-10.2.z] (JIRA:AlmaLinux-211310)

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.