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2.3 Low

CVE-2026-42245 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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. 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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