CVE-2026-59997: OpenBSD OpenSSH

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.

Affected products

• OpenBSD OpenSSH: before 10.4 (fixed in 10.4)

Published 2026-07-08. Last modified 2026-07-09.