CVE-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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2	Release Notes
https://www.openssh.org/releasenotes.html#10.4p1	Release Notes
https://www.openwall.com/lists/oss-security/2026/07/06/5	Mailing List Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) sshd en OpenSSH antes de 10.4 tiene un comportamiento no documentado relevante para la seguridad: GSSAPIStrictAcceptorCheck no tiene valor si el servidor está en un Directorio Activo de Windows.

Information

Published : 2026-07-08 01:16

Updated : 2026-10-25 20:10

NVD link : CVE-2026-59998

Mitre link : CVE-2026-59998

CVE.ORG link : CVE-2026-59998

JSON object : View

Products Affected

openbsd

openssh

CWE

CWE-573

Improper Following of Specification by Caller

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