Vulnerability DatabaseCVE-2026-59998
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CVE-2026-59998
Published:July 08, 2026
Updated:July 20, 2026
sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.
Affected Packages
https://github.com/openssh/openssh-portable.git (GITHUB):
Affected version(s) >=V_3_3_P1 <V_10_4_P1
Fix Suggestion:
Update to version V_10_4_P1
Related Resources (3)
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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CVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Following of Specification by Caller
CWE-573
EPSS
Base Score:
0.18