Detections
Analytics
Ruby net-imap < 0.5.15 / 0.6.x < 0.6.4.1 Multiple Vulnerabilities
medium Nessus Plugin ID 321503
Language:
Synopsis
The remote host has a module installed that is affected by multiple vulnerabilities.Description
The version of the net-imap Ruby library installed on the remote host is prior to 0.5.15, or 0.6.x prior to 0.6.4.1.It is, therefore, affected by multiple vulnerabilities.
- 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. (CVE-2026-47240)
- Several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command, causing a denial of service. (CVE-2026-47241)
- Two Net::IMAP commands, id and enable, do not validate their arguments. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. (CVE-2026-47242)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to net-imap version 0.5.15 or 0.6.4.1 or later.See Also
http://www.nessus.org/u?0f4b0562
Plugin Details
Severity: Medium
ID: 321503
File Name: ruby_gem_netimap_CVE_2026_47240_47241_47242.nasl
Version: 1.4
Type: Local
Agent: windows, macosx, unix
Family: Misc.
Published: 6/18/2026
Updated: 6/26/2026
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 58.03
CVSS v2
Risk Factor: Medium
Base Score: 5.6
Temporal Score: 4.1
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:P
CVSS Score Source: CVE-2026-47240
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.8
Threat Score: 1.9
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-47242
Vulnerability Information
CPE: cpe:/a:ruby:net-imap
Required KB Items: Host/ruby/modules/enumerated
Exploit Ease: No known exploits are available
Patch Publication Date: 6/9/2026
Vulnerability Publication Date: 6/9/2026
Reference Information
CVE: CVE-2026-47240, CVE-2026-47241, CVE-2026-47242
IAVB: 2026-B-0162