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5.8 Medium

CVE-2026-47242 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 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.

Affected products and versions

Product Affected versions Fixed in
net-imap 0.6 0.6.0 → < 0.6.4.1 0.6.4.1
net-imap 0.5 earliest → < 0.5.15 0.5.15

References

Timeline

  1. Published
  2. Last modified

Other CVEs of net-imap

The 10 CVEs of net-imap →
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 CVE-2026-42257 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby 5.8 Medium
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