CVE-2026-47240

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

No CVSS.

References

Link	Resource
https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8

Configurations

No configuration.

History

22 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 21:16

Updated : 2026-06-23 16:16

NVD link : CVE-2026-47240

Mitre link : CVE-2026-47240

CVE.ORG link : CVE-2026-47240

JSON object : View

Products Affected

No product.

CWE

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

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