SB2026111248 - Anolis OS update for openssh
Published: November 12, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Incorrect authorization (CVE-ID: CVE-2026-106586)
CWE-ID: CWE-863 - Incorrect Authorization
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to bypass authorized key restrictions on tunnel forwarding.
The vulnerability exists due to improper authorization in sshd when applying the authorized_keys restrict keyword to tunnel forwarding. A remote user can authenticate using a restricted key and request tunnel forwarding to establish a tunnel that the key restrictions should prohibit.
Exploitation requires tunnel forwarding to be enabled through PermitTunnel, which is disabled by default.
2) Improper access control (CVE-ID: CVE-2026-73283)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to bypass forwarding restrictions.
The vulnerability exists due to improper access control in sshd authorized_keys restrict keyword enforcement when handling tunnel forwarding. A remote user can use tunnel forwarding despite intended restrictions to bypass forwarding restrictions.
Tunnel forwarding is administratively disabled by default.
Remediation
Install update from vendor's website.