# CVE-2026-59998

## Summary

- **CVE ID:** CVE-2026-59998
- **Severity:** MEDIUM
- **CVSS Score:** 4.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-573
- **Published:** Jul 8, 2026
- **Last Modified:** 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.

## Affected Products

- OpenBSD — OpenSSH (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._