CVE-2026-42246: fallo de gravedad alta en ruby net-imap
net-imap vulnerable to STARTTLS stripping via invalid response timing
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.6epss 0.3%
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Productos afectados
ruby · net-imapCVEs relacionadas — ruby net-imap
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-47240MEDIUMNet::IMAP: Command Injection via non-synchronizing literal in "raw" argumentEPSS 0.8%CVE-2026-42258MEDIUMnet-imap: Command Injection via unvalidated Symbol inputsEPSS 0.8%CVE-2025-25186MEDIUMNet::IMAP vulnerable to possible DoS by memory exhaustionEPSS 0.6%CVE-2025-43857MEDIUMnet-imap rubygem vulnerable to possible DoS by memory exhaustionEPSS 0.5%CVE-2026-42257MEDIUMnet-imap: Command Injection via "raw" arguments to multiple commandsEPSS 0.4%CVE-2026-42245LOWnet-imap: Quadratic complexity when reading response literalsEPSS 0.4%
Referencias
https://access.redhat.com/errata/RHSA-2026:33462https://access.redhat.com/errata/RHSA-2026:33512https://access.redhat.com/errata/RHSA-2026:33514https://access.redhat.com/errata/RHSA-2026:33515https://access.redhat.com/errata/RHSA-2026:33540https://access.redhat.com/errata/RHSA-2026:33551https://access.redhat.com/errata/RHSA-2026:33552https://access.redhat.com/errata/RHSA-2026:33565https://access.redhat.com/errata/RHSA-2026:33576https://access.redhat.com/errata/RHSA-2026:33577https://access.redhat.com/errata/RHSA-2026:33630https://access.redhat.com/errata/RHSA-2026:33721