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5.8 Medium

CVE-2026-42257 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby

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, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Affected products and versions

Product Affected versions Fixed in
net-imap 0.6 0.6.0 → < 0.6.4 0.6.4
net-imap 0.5 0.5.0 → < 0.5.14 0.5.14
net-imap 0.4 earliest → < 0.4.24 0.4.24

References

Timeline

  1. Published
  2. Last modified

Other CVEs of net-imap

The 10 CVEs of net-imap →
CVE-2026-47242 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby 5.8 Medium CVE-2026-47240 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby 5.8 Medium CVE-2026-47241 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby 2.1 Low CVE-2026-42258 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby 5.8 Medium
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