Detections
Analytics

Echo: openssh: security update to 1:10.4p1-1+e1

low Tenable Cloud Security Plugin ID 455258

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of
 GSSAPI (Generic Security Service Application Programming Interface) indicators when a trailing NULL
 termination is missing in the auth-indicators array. A remote attacker, under specific configurations
 involving GSSAPI authentication and a Kerberos environment, could exploit this to cause the SSH
 authentication path to crash or abort. This leads to a denial of service (DoS), impacting the availability
 of the SSH service. (CVE-2026-55654)

Solution

Update the openssh library and its related packages to version 1:10.4p1-1+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-55654

Plugin Details

Severity: Low

ID: 455258

Version: Revision 1.2

Type: Local

Published: 10/1/2026

Updated: 10/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 2

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

CVSS Score Source: CVE-2026-55654

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.4

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/23/2026

Vulnerability Publication Date: 6/23/2026

Reference Information

CVE: CVE-2026-55654

IAVA: 2026-A-0691-S