Missing Authentication for Critical Function Affecting openssh-keycat-debuginfo package, versions <0:8.7p1-8.amzn2023.0.18


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-AMZN2023-OPENSSHKEYCATDEBUGINFO-16886065
  • published27 May 2026
  • disclosed2 Apr 2026

Introduced: 2 Apr 2026

CVE-2026-35388  (opens in a new tab)
CWE-306  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 openssh-keycat-debuginfo to version 0:8.7p1-8.amzn2023.0.18 or higher.
This issue was patched in ALAS2023-2026-1745.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-keycat-debuginfo package and not the openssh-keycat-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1