CVE-2026-47242

CVE Details

Release Date:	2026-06-22
Impact:	Moderate	What is this?

Description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.

See more information about CVE-2026-47242 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	0.0
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (ruby)	ELSA-2026-50728	2026-08-10
Oracle Linux version 8 (rubygem-abrt)	ELSA-2026-50728	2026-08-10
Oracle Linux version 8 (rubygem-mysql2)	ELSA-2026-50728	2026-08-10
Oracle Linux version 8 (rubygem-pg)	ELSA-2026-50728	2026-08-10
Oracle Linux version 9 (ruby)	ELSA-2026-50827	2026-08-10
Oracle Linux version 9 (ruby)	ELSA-2026-50828	2026-08-07
Oracle Linux version 9 (rubygem-mysql2)	ELSA-2026-50827	2026-08-10
Oracle Linux version 9 (rubygem-mysql2)	ELSA-2026-50828	2026-08-07
Oracle Linux version 9 (rubygem-pg)	ELSA-2026-50827	2026-08-10
Oracle Linux version 9 (rubygem-pg)	ELSA-2026-50828	2026-08-07