Unprotected Alternate Channel Affecting openssh package, versions <0:8.7p1-49.el9_7.alma.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ALMALINUX9-OPENSSH-16419519
  • published5 May 2026
  • disclosed4 May 2026

Introduced: 4 May 2026

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

How to fix?

Upgrade AlmaLinux:9 openssh to version 0:8.7p1-49.el9_7.alma.1 or higher.
This issue was patched in ALSA-2026:13381.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1