Vulnerability in IBM I

CVE-2026-18251

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to improper validation of the WebSocket origin.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Ibm I — versions 7.3, 7.4, 7.5

Weakness classification (CWE)

CWE-1385

References

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

Frequently asked questions

What is CVE-2026-18251?: CVE-2026-18251 is a medium-severity vulnerability in IBM I, classified under CWE-1385. CVSS score: 4.3/10. Published 2026-09-14.
How severe is CVE-2026-18251?: Medium severity. CVSS v3 base score is 4.3 out of 10.