CVE-2026-17109

Analyzed Analyzed - Analysis Complete

IBM i Command Parameter Injection Vulnerability

Publication date: 2026-08-12

Last updated on: 2026-08-13

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to add unexpected parameters to a command due to parameter injection.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-12

Last Modified

2026-08-13

Generated

2026-09-02

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-31

NVD

CVE-2026-17109

EUVD

EUVD-2026-57374

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	From 7.3 (inc) to 7.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

CVE-2026-17109 is a vulnerability in IBM i where a remote authenticated attacker could inject unexpected parameters into a command due to improper input validation. This occurs because the system fails to properly validate user-supplied input before processing commands.

Detection Guidance

Detecting this vulnerability requires checking for improper input validation in IBM i commands. Review system logs for unusual command parameters or unexpected user inputs. Use IBM i commands like DSPLOG to examine job logs for suspicious activity. Ensure input validation is enforced in custom or modified commands.

Impact Analysis

This vulnerability could allow an attacker to alter command behavior, potentially leading to unintended system actions or disruptions. While it does not directly impact confidentiality or integrity, it may cause low availability issues by consuming system resources or causing unexpected behavior.

Compliance Impact

This vulnerability involves improper input validation allowing parameter injection in IBM i systems. While it does not directly expose sensitive data, unauthorized command manipulation could lead to system instability or unintended actions. Compliance impact depends on how the system is used; for example, unauthorized changes could violate integrity controls in GDPR or HIPAA if they affect data processing or storage systems.

Mitigation Strategies

Apply the recommended PTFs immediately: SJ10870 for IBM i 7.3, SJ10869 for 7.4, SJ10868 for 7.5, and SJ10867 for 7.6. Verify PTF installation using WRKPTFGRP. Monitor IBM i support pages for updates and additional guidance.

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