CVE-2026-42256

Published May 9th, 2026

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CVSS v3

6.5

MEDIUM

CVSS v2

N/A

Affected

PROJECT

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.

ruby/net-imap

Ruby client api for Internet Message Access Protocol

GitHub

114