PatchTheCVECVE-2026-18148: IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to inject arbitrary content into Navi
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Routine
MEDIUM 4.3MITIGATE
CVE-2026-18148 is a medium-severity flaw (CVSS 4.3) affecting i. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 73%) |
| CISA exploited list | No |
| Weakness | CWE-117 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): IBM Corporation · Vendor: ibm
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
ibm i MITIGATE
Affected: 7.3 · 7.4 · 7.5 · 7.6
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.3
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-18683 HIGH 8.8 MITIGATE IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i
- CVE-2026-17095 HIGH 8.3 MITIGATE IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due t
- CVE-2026-18847 HIGH 8.8 MITIGATE IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote unauthenticated attacker to harvest credentials due to spoof
- CVE-2026-18098 HIGH 8.1 MITIGATE IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to obtain sensitive information and c
- CVE-2026-16694 MEDIUM 6.4 MITIGATE IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to stored cross-site scripting