Detections
Analytics

RHEL 10 : ruby4.0 (RHSA-2026:33540)

high Nessus Plugin ID 323969

Synopsis

The remote Red Hat host is missing one or more security updates for ruby4.0.

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:33540 advisory.

 Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight- forward, and extensible.

 Security Fix(es):

 * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)

 * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)

 * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS (CVE-2026-42246)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL ruby4.0 package based on the guidance in RHSA-2026:33540.

See Also

https://access.redhat.com/errata/RHSA-2026:33540

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2468495

https://bugzilla.redhat.com/show_bug.cgi?id=2468498

https://bugzilla.redhat.com/show_bug.cgi?id=2468499

http://www.nessus.org/u?c1898177

Plugin Details

Severity: High

ID: 323969

File Name: redhat-RHSA-2026-33540.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/30/2026

Updated: 6/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-42246

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.6

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:ruby4.0-devel, p-cpe:/a:redhat:enterprise_linux:ruby4.0-rubygem-mysql2, p-cpe:/a:redhat:enterprise_linux:ruby4.0, p-cpe:/a:redhat:enterprise_linux:ruby4.0-doc, cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:ruby4.0-rubygem-pg

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 6/30/2026

Vulnerability Publication Date: 5/4/2026

Reference Information

CVE: CVE-2026-42245, CVE-2026-42246, CVE-2026-42258

CWE: 325, 606, 93

RHSA: 2026:33540