PT-2026-56290 · Openssh · Openssh

Published 2026-07-08 · Updated 2026-07-13 · CVE-2026-59999

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/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

USN-8533-1

Affected Products

Openssh

References · 22

• https://ubuntu.com/security/CVE-2026-59998 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8533-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-59999 · Security Note
• https://ubuntu.com/security/CVE-2026-60001 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-60000 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-59996 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-59999 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-59999 · Security Note
• https://ubuntu.com/security/CVE-2026-59995 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-59999 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8533-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-60002 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-59997 · Vendor Advisory
• https://openwall.com/lists/oss-security/2026/07/06/5 · Note
• https://t.me/CVEtracker/59316 · Telegram Post