Arbitrary Command Injection Affecting jruby-9.4 package, versions <9.4.15.0-r2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.78% (53rd percentile)

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  • Snyk IDSNYK-WOLFILATEST-JRUBY94-18353265
  • published28 Jul 2026
  • disclosed9 May 2026

Introduced: 9 May 2026

CVE-2026-42258  (opens in a new tab)
CWE-77  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade Wolfi jruby-9.4 to version 9.4.15.0-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jruby-9.4 package and not the jruby-9.4 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, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to 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