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4.3

IBM Navigator for i Log Injection Vulnerability in IBM i

CVE-2026-18148 · published 2 months ago
Summary

IBM Navigator for i on certain IBM i versions may allow a remote attacker to inject malicious content into log files. This could potentially be used to gain unauthorized access or disrupt system functionality. IBM recommends updating to the latest version of Navigator for i to address this issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ibm i 7.6
Original advisory text
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to inject arbitrary content into Navigator log files due to improper output neutralization for logs.
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to inject arbitrary content into Navigator log files due to improper output neutralization for logs.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-117Improper Output Neutralization for Logs
Timeline
Published12 Aug 2026
Updated4 Nov 2026
First seen12 Aug 2026
Sources
CVE-2026-18148 · NVD
CVE-2026-18148 · MITRE
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