Arbitrary Command Injection Affecting ruby3.3-net-imap package, versions <0.6.4-r0


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.02% (4th percentile)

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  • Snyk IDSNYK-WOLFILATEST-RUBY33NETIMAP-16780272
  • published20 May 2026
  • disclosed9 May 2026

Introduced: 9 May 2026

NewCVE-2026-42257  (opens in a new tab)
CWE-77  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade Wolfi ruby3.3-net-imap to version 0.6.4-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby3.3-net-imap package and not the ruby3.3-net-imap package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

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, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS Base Scores

version 3.1