JLSEC-2026-1322 Medium 6.5

sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior:...

JLSEC Published: Aug 14, 2026
Modified: Aug 14, 2026
Severity: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Packages: OpenSSH_jll < 10.4.1+0
Upstream: CVE-2026-59998 GHSA-3j2g-cqmq-cjw9 EUVD-2026-42141

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://github.com/advisories/GHSA-3j2g-cqmq-cjw9
https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2
https://nvd.nist.gov/vuln/detail/CVE-2026-59998
https://www.openssh.org/releasenotes.html#10.4p1
https://www.openwall.com/lists/oss-security/2026/07/06/5