Skip to content
Sign in
6.0 Medium

CVE-2026-42256 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. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. 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 0.4.0 → < 0.4.24 0.4.24

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
Track this CVE