Red Hat Security Advisory: ruby4.0 security, bug fix, and enhancement update
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 [rhel-10.2.z] (JIRA:RHEL-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.
Red Hat Security Advisory: ruby4.0 security, bug fix, and enhancement update
Description
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 [rhel-10.2.z] (JIRA:RHEL-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.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:50773
- Cve Count
- 6
- Additional Cves
- ["CVE-2026-42256","CVE-2026-42257","CVE-2026-47240","CVE-2026-47241","CVE-2026-47242"]
- Cvss Version
- null
Threat ID: 6a9053dcacd9273b4969666f
Added to database: 08/27/2026, 15:12:28 UTC
Last updated: 08/28/2026, 02:51:59 UTC
Views: 3
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