Improper Restriction of Communication Channel to Intended Endpoints Affecting openssh-ldap package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (1st percentile)

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  • Snyk IDSNYK-CENTOS8-OPENSSHLDAP-17429948
  • published23 Jun 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

NewCVE-2026-55655  (opens in a new tab)
CWE-923  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 openssh-ldap.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-ldap package and not the openssh-ldap package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1