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ruby: SMTP command injection via CRLF sequences in RCPT TO or MAIL FROM commands in Net::SMTP

🗓️ 09 Apr 2026 12:35:20Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 2 Views

Ruby Net::SMTP flaw allows CRLF in RCPT TO or MAIL FROM to inject SMTP commands, enabling phishing.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Images20251124aarch64ruby3.33.3.10-23.1.hum1ruby3.3-3.3.10-23.1.hum1.aarch64.rpm
Red Hat Hardened Images20251124x86_64ruby3.33.3.10-23.1.hum1ruby3.3-3.3.10-23.1.hum1.x86_64.rpm
Red Hat Hardened Images20251124noarchruby3.3-default-gems3.3.10-23.1.hum1ruby3.3-default-gems-3.3.10-23.1.hum1.noarch.rpm

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28 Jun 2026 12:56Current
6.6Medium risk
Vulners AI Score6.6
CVSS 24.3
CVSS 36.1
EPSS0.03675
2