CVE-2026-110928

openssh: openssh: authorized_keys restrict does not apply to tunnel forwarding

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · October 15, 2026

Updated · October 15, 2026

Description

A flaw was found in OpenSSH. The authorized_keys "restrict" keyword was not applied to tunnel forwarding. When PermitTunnel is enabled, a restricted key can still open a tunnel.

Statement

Red Hat Enterprise Linux is not affected. The downstream patch for CVE-2026-59999 is stricter than the upstream OpenSSH 10.6 fix for this tunnel restriction. PermitTunnel is disabled by default.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CWE-284 · Improper Access Control