Detections
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Echo: openssh: security update to 1:10.4p1-1+e2

medium Tenable Self-Hosted Container Security Plugin ID 465156

Description

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

 - A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side
 X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11
 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the
 confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow
 some manipulation of the forwarded session. (CVE-2026-55655)

Solution

Update the openssh library and its related packages to version 1:10.4p1-1+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-55655

Plugin Details

Severity: Medium

ID: 465156

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.86

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

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

CVSS Score Source: CVE-2026-55655

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:H/I:L/A:N

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2026

Vulnerability Publication Date: 6/23/2026

Reference Information

CVE: CVE-2026-55655