Detections
Analytics

CentOS 9 : openssh-9.9p1-12.el9

high Nessus Plugin ID 337899

Synopsis

The remote CentOS host is missing one or more security updates for openssh.

Description

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the openssh-9.9p1-12.el9 build changelog.

 - In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not. (CVE-2026-59999)

 - sftp client allows attacker to control downloaded file location (CVE-2026-59995)

 - Security bypass due to incorrect handling of forwarding and tunneling options (CVE-2026-73283)

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 CentOS 9 Stream openssh package.

See Also

https://kojihub.stream.centos.org/koji/buildinfo?buildID=124411

Plugin Details

Severity: High

ID: 337899

File Name: centos9_openssh-9_9p1-12_124411.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/19/2026

Updated: 8/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-59999

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:openssh-askpass, p-cpe:/a:centos:centos:openssh-clients, p-cpe:/a:centos:centos:openssh-keycat, p-cpe:/a:centos:centos:openssh-server, p-cpe:/a:centos:centos:openssh-sk-dummy, p-cpe:/a:centos:centos:openssh, p-cpe:/a:centos:centos:pam_ssh_agent_auth

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/12/2026

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-59995, CVE-2026-59999, CVE-2026-73283

IAVA: 2026-A-0691-S, 2026-A-0847