CVE-2026-42258

Published May 9th, 2026

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CVSS v3

9.8

CRITICAL

CVSS v2

N/A

Affected

PROJECT

Description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

ruby/net-imap

Ruby client api for Internet Message Access Protocol

GitHub

114