Important: ruby4.0 security 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): * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245) * 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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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): * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245) * 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.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2026:33540
- https://access.redhat.com/security/cve/CVE-2026-42245
- https://access.redhat.com/security/cve/CVE-2026-42246
- https://access.redhat.com/security/cve/CVE-2026-42258
- https://bugzilla.redhat.com/2468495
- https://bugzilla.redhat.com/2468498
- https://bugzilla.redhat.com/2468499
- https://errata.almalinux.org/10/ALSA-2026-33540.html