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RHEL 10 : cockpit: Unauthenticated remote code execution due to SSH command-line argument injection (Critical) (RHSA-2026:7383)

critical Nessus Plugin ID 307025

Synopsis

The remote Red Hat host is missing a security update.

Description

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:7383 advisory.

 Cockpit enables users to administer GNU/Linux servers using a web browser. It offers network configuration, log inspection, diagnostic reports, SELinux troubleshooting, interactive command-line sessions, and more.

 Security Fix(es):

 * cockpit: ws: be more explicit when handling hostnames on cli (CVE-2026-4631)

 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 this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

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

https://access.redhat.com/errata/RHSA-2026:7383

http://www.nessus.org/u?9cf9622e

Plugin Details

Severity: Critical

ID: 307025

File Name: redhat-RHSA-2026-7383.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/17/2026

Updated: 4/17/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-4631

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:cockpit-ws, p-cpe:/a:redhat:enterprise_linux:cockpit-storaged, p-cpe:/a:redhat:enterprise_linux:cockpit-system, p-cpe:/a:redhat:enterprise_linux:cockpit-ws-selinux, p-cpe:/a:redhat:enterprise_linux:cockpit-doc, cpe:/o:redhat:enterprise_linux:10.1, p-cpe:/a:redhat:enterprise_linux:cockpit, p-cpe:/a:redhat:enterprise_linux:cockpit-bridge, p-cpe:/a:redhat:enterprise_linux:cockpit-packagekit

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: 4/10/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-4631

CWE: 78

RHSA: 2026:7383