Unprotected Alternate Channel Affecting openssh-clients package, versions <0:8.0p1-29.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ALMALINUX8-OPENSSHCLIENTS-16419456
  • published5 May 2026
  • disclosed19 May 2026

Introduced: 5 May 2026

CVE-2026-35388  (opens in a new tab)
CWE-420  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 openssh-clients to version 0:8.0p1-29.el8_10 or higher.
This issue was patched in ALSA-2026:13383.

NVD Description

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

OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.

CVSS Base Scores

version 3.1