{"id":"RLSA-2026:50828","summary":"Important: ruby:3.3 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\n* net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)\n\n* ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)\n\n* net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)\n\n* net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)\n\n* net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)\n\nBug Fix(es) and Enhancement(s):\n\n* ruby:3.3/ruby: Rebase to the latest Ruby 3.3 release [rhel-9.8.z] (JIRA:Rocky Linux-171335)\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.","modified":"2026-08-27T00:30:03.625934845Z","published":"2026-08-27T00:04:44.346173Z","upstream":["CVE-2026-27820","CVE-2026-42256","CVE-2026-42257","CVE-2026-47240","CVE-2026-47241","CVE-2026-47242"],"database_specific":{"source_advisory":"RHSA-2026:50828","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:50828"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459002"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468494"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468500"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491519"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491522"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491523"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50828"}],"affected":[{"package":{"name":"ruby","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/ruby?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:3.3.12-8.module+el9.8.0+40270+7a73441e"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:50828.json"}},{"package":{"name":"rubygem-mysql2","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/rubygem-mysql2?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.5.5-3.module+el9.7.0+40032+36e56d0d"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:50828.json"}},{"package":{"name":"rubygem-pg","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/rubygem-pg?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.5.4-2.module+el9.7.0+40188+314ad260.0.1"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:50828.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}