NetSight
IP …
high7.4

CVE-2026-42246

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby.

Impact

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.

Affected packages

EcosystemPackageAffectedFixed in
rubygemsnet-imap>= 0.6.0, <= 0.6.30.6.4

Affected products

VendorProductAffected versions
Ruby-LangNet\
before 0.3.10
from 0.4.0 before 0.4.24
from 0.5.0 before 0.5.14
from 0.6.0 before 0.6.4

Weakness classification

CWE-392CWE-393CWE-636CWE-754CWE-841CWE-325

References