What is CVE-2026-18683?

CVE-2026-18683 is a high-severity vulnerability in Ibm I, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-12.

How severe is CVE-2026-18683?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Ibm I

CVE-2026-18683

IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i. An authenticated user could elevate privileges to a root user to execute commands.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18683?: CVE-2026-18683 is a high-severity vulnerability in Ibm I, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-12.
How severe is CVE-2026-18683?: High severity. CVSS v3 base score is 8.8 out of 10.