PT-2026-56290 · Openssh · Openssh

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-59999

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions OpenSSH versions prior to 10.4

Description In sshd, the configuration setting DisableForwarding=yes failed to take precedence over PermitTunnel=yes, allowing tunnel forwarding even when it should have been disabled.

Recommendations Update to version 10.4 or later.

Fix

Weakness Enumeration

CWE-348

Related Identifiers

CVE-2026-59999

Affected Products

Openssh

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-59999 · Security Note
• https://openwall.com/lists/oss-security/2026/07/06/5 · Note
• https://openssh.org/releasenotes.html#10.4p1 · Note
• https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2 · Note
• https://twitter.com/infoflowcloud/status/2074730534580662578 · Twitter Post
• https://twitter.com/CVEnew/status/2074728404738318562 · Twitter Post