CVE-2026-59998

At a glance

Severity: MEDIUM 4.8
EPSS: EPSS 0.18 % · percentile 7 (2026-10-27)
State: PUBLISHED
Published: 2026-07-08
Updated: 2026-07-08
Assigner: mitre
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	mitre
CVSS 3.1	MEDIUM 4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · cve@mitre.org (Secondary)
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-573

European references

ENISA EUVD · EUVD-2026-42141
GCVE · GCVE-0-2026-59998

Affected configurations (NVD CPE)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* < 10.4

Affected products

Product	Versions
OpenBSD · OpenSSH	affected 0 < 10.4

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD