Improper Following of Specification by Caller Affecting openssh package, versions <1:10.4p1-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-OPENSSH-17893226
  • published8 Jul 2026
  • disclosed8 Jul 2026

Introduced: 8 Jul 2026

CVE-2026-59998  (opens in a new tab)
CWE-573  (opens in a new tab)

How to fix?

Upgrade Debian:unstable openssh to version 1:10.4p1-1 or higher.

NVD Description

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

sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.

CVSS Base Scores

version 3.1