CVE-2026-47242
Net::IMAP: Command Injection via ID command argument
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.
| CWE | CWE-77 CWE-93 |
| Vendor | ruby |
| Product | net-imap |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 22, 2026 |
Get instant alerts for ruby net-imap
Be the first to know when new unknown vulnerabilities affecting ruby net-imap are published — delivered to Slack, Telegram or Discord.