CVE-2026-59998

State: Published
Severity: 4.8 Medium
Published: Jul 8, 2026
Updated: Jul 8, 2026
Reserved: Jul 8, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	mitre

Weaknesses

CWE-573 Improper Following of Specification by Caller

Affected Products

Product	Versions
OpenSSHOpenBSD	before 10.4Affected

References

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

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