SB2026090114 - Multiple vulnerabilities in IBM i

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Main Vulnerability Database SB2026090114

SB2026090114 - Multiple vulnerabilities in IBM i

Published: September 1, 2026 Updated: September 30, 2026

Security Bulletin ID SB2026090114
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper access control (CVE-ID: CVE-2026-59999)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to enable tunneling despite forwarding restrictions.

The vulnerability exists due to improper access control in sshd(8) when DisableForwarding=yes and PermitTunnel=yes are configured together. A remote privileged user can use tunneling despite forwarding restrictions to enable tunneling despite forwarding restrictions.

Exploitation requires configurations where PermitTunnel is enabled.


2) Protection mechanism failure (CVE-ID: CVE-2026-60001)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to weaken authentication rate limiting.

The vulnerability exists due to improper enforcement of security policy in sshd(8) when handling authentication attempts. A remote attacker can send authentication attempts to weaken authentication rate limiting.

The issue affects cases where the minimum authentication delay was not enforced.


Remediation

Install update from vendor's website.

References