{"id":"ALSA-2026:50778","summary":"Important: ruby security, bug fix, and enhancement update","details":"Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.  \n\nSecurity Fix(es):  \n\n  * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)\n  * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)\n  * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)\n  * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)\n  * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)\n  * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * ruby: Rebase to the latest Ruby 3.3 release [almalinux-10.2.z] (JIRA:AlmaLinux-211300)\n\n\nFor 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.\n","modified":"2026-09-14T12:11:41.674956986Z","published":"2026-08-05T00:00:00Z","related":["CVE-2026-27820","CVE-2026-42256","CVE-2026-42257","CVE-2026-47240","CVE-2026-47241","CVE-2026-47242"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50778"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-27820"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-42256"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-42257"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-47240"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-47241"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-47242"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2459002"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2468494"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2468500"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2491519"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2491523"},{"type":"ADVISORY","url":"https://errata.almalinux.org/10/ALSA-2026-50778.html"}],"affected":[{"package":{"name":"ruby","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"ruby-bundled-gems","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby-bundled-gems"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"ruby-default-gems","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby-default-gems"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"ruby-devel","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"ruby-doc","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby-doc"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"ruby-libs","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/ruby-libs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.12-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-bigdecimal","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-bigdecimal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.5-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-bundler","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-bundler"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.22-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-io-console","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-io-console"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.1-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-irb","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-irb"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.1-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-json","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-json"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.2-14.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:50778.json"}},{"package":{"name":"rubygem-minitest","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/rubygem-minitest"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.20.0-14.el10_2"}]}],"database_specific":{"source":"ht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