CVE-2026-59998
CVSS v3
4.8
MEDIUM
EPSS Score
0.2 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- CVSS v3 Vector
- 3.1
- Published
- 2026-07-08
- Last Modified
- 2026-07-08
Frequently asked questions
What is 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.
Is CVE-2026-59998 actively exploited?
Active exploitation of CVE-2026-59998 has not been confirmed. The EPSS score is 0.2%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-59998?
CVE-2026-59998 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string 3.1.
Is CVE-2026-59998 affecting your environment?
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