CVE-2026-2311

Received Received - Intake

IBM i Web Administration Privilege Escalation Vulnerability

Publication date: 2026-04-30

Last updated on: 2026-05-01

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, 7.3, and 7.2 s vulnerable to privilege escalation caused by an invalid IBM i Web Administration GUI authorization check. A malicious actor could cause user-controlled code to run with administrator privilege.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-30

Last Modified

2026-05-01

Generated

2026-07-06

AI Q&A

2026-05-01

EPSS Evaluated

2026-07-05

NVD

CVE-2026-2311

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.2
ibm	i	7.3
ibm	i	7.4
ibm	i	7.5
ibm	i	7.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Mitigation Strategies

To mitigate the CVE-2026-2311 vulnerability in IBM i Web Administration GUI, users should apply the relevant Program Temporary Fixes (PTFs) released by IBM for their specific IBM i versions (7.2 through 7.6).

There are no available workarounds currently, so applying the official fixes is critical.

Additionally, IBM recommends upgrading to supported versions if you are running unsupported software.

Executive Summary

This vulnerability affects IBM i versions 7.6, 7.5, 7.4, 7.3, and 7.2. It is caused by an invalid authorization check in the IBM i Web Administration GUI, which allows a malicious actor to escalate privileges.

Specifically, an attacker could exploit this flaw to run user-controlled code with administrator privileges.

Impact Analysis

The vulnerability can lead to privilege escalation, meaning an attacker could gain administrator-level access on the affected IBM i system.

With administrator privileges, the attacker could execute arbitrary code, potentially compromising system integrity, confidentiality, and availability.

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