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Microsoft Security Response CenterCVE-2026-59998

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

Mariner

Read the vendor bulletin Get alerts for azl3 openssh 9.8p1-8 on Azure Linux
4.8CVSS out of 10Medium severity
Scope

What the vendor says is affected

  • azl3 openssh 9.8p1-8 on Azure Linux 3.0
  • azl3 openssh 9.8p1-9 on Azure Linux 3.0
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-59998View CVSS, KEV, EPSS, and threat context
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