CVE-2026-59998

medium

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.

References

https://www.openwall.com/lists/oss-security/2026/07/06/5

https://www.openssh.org/releasenotes.html#10.4p1

https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42141

Details

Source: Mitre, NVD

Published: 2026-07-08

Updated: 2026-07-09

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N