CVE-2026-17111: IBM i SQL Injection Vulnerability

CVE-2026-17111 Overview

CVE-2026-17111 is a SQL injection vulnerability affecting IBM i versions 7.6, 7.5, 7.4, and 7.3. A remote authenticated attacker can send specially crafted SQL statements to view, add, modify, or delete data in the back-end database. The flaw is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command.

The vulnerability requires low privileges and no user interaction. It affects the confidentiality, integrity, and availability of data managed by the IBM i database engine. IBM has published a support advisory addressing this issue.

Critical Impact
A remote attacker with low privileges can execute arbitrary SQL commands against the IBM i back-end database, enabling unauthorized data disclosure, modification, or deletion.

Affected Products

IBM i 7.6
IBM i 7.5
IBM i 7.4
IBM i 7.3

Discovery Timeline

2026-08-12 - CVE CVE-2026-17111 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-17111

Vulnerability Analysis

The vulnerability resides in IBM i database handling components that process SQL statements without adequate input neutralization. An authenticated attacker submits crafted input containing SQL syntax that the application concatenates into a query. The database engine executes the injected statements with the privileges of the calling process.

The attack is network-reachable and requires low complexity to execute. Successful exploitation grants read and write access to database contents accessible by the compromised session. Impact scope depends on the privileges of the account used to authenticate.

Root Cause

The root cause is improper neutralization of special elements in SQL commands [CWE-89]. Application code constructs SQL queries by concatenating untrusted input rather than using parameterized queries or prepared statements. The database engine cannot distinguish between developer-authored SQL and attacker-supplied SQL fragments.

Attack Vector

The attack vector is network-based and requires low privileges. An authenticated attacker sends specially crafted SQL statements to a vulnerable IBM i interface. No user interaction is required. The attacker can then read, insert, update, or delete rows in tables accessible to the session.

Refer to the IBM Support Page for the technical advisory and remediation details.

Detection Methods for CVE-2026-17111

Indicators of Compromise

Unusual SQL error messages in IBM i job logs, particularly syntax errors originating from application-layer queries.
Unexpected SELECT, INSERT, UPDATE, or DELETE operations executed by service or application accounts outside normal usage windows.
Anomalous authenticated sessions issuing large volumes of database queries against sensitive schemas.

Detection Strategies

Enable IBM i database monitor (STRDBMON) and audit journals to capture SQL statements executed against sensitive libraries.
Correlate application input logs with database query logs to identify user-supplied payloads containing SQL metacharacters such as ', --, ;, or UNION.
Baseline normal query patterns per application account and alert on deviations in query structure, tables accessed, or row counts returned.

Monitoring Recommendations

Forward IBM i audit journal (QAUDJRN) entries and database monitor output to a centralized SIEM for continuous analysis.
Monitor for authentication anomalies from low-privilege accounts followed by database access to unfamiliar tables.
Track schema changes and privilege modifications on production databases as potential post-exploitation activity.

How to Mitigate CVE-2026-17111

Immediate Actions Required

Apply the IBM-provided fix documented on the IBM Support Page for IBM i 7.6, 7.5, 7.4, and 7.3.
Review and restrict privileges of application and service accounts that interact with the IBM i database to enforce least privilege.
Audit recent database activity for signs of injection attempts or unauthorized data changes.

Patch Information

IBM has published remediation guidance on its support portal. Administrators should reference the IBM Support Page to obtain the applicable PTFs or Group PTFs for each affected release of IBM i.

Workarounds

Restrict network access to IBM i database services so only trusted application hosts can reach them.
Where feasible, enforce input validation and parameterized queries in front-end applications that submit SQL to IBM i.
Revoke unnecessary database object authorities from application accounts until patches are deployed.

bash

# Configuration example
# Refer to the IBM Support Page for authoritative PTF installation guidance:
# https://www.ibm.com/support/pages/node/7283289