Arbitrary Command Injection Affecting truffleruby package, versions <34.0.1-r2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.49% (39th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-TRUFFLERUBY-17754217
  • published1 Jul 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-47240  (opens in a new tab)
CWE-77  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade Chainguard truffleruby to version 34.0.1-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream truffleruby package and not the truffleruby package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals. A server without support for non-synchronizing literals may interpret the "+}\r\n" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS Base Scores

version 3.1