What is CVE-2026-2311?

CVE-2026-2311 is a medium-severity vulnerability in Ibm I, classified under Improper Access Control. CVSS score: 6.4/10. Published 2026-04-30.

How severe is CVE-2026-2311?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Ibm I

CVE-2026-2311

IBM i 7.6, 7.5, 7.4, 7.3, and 7.2 s vulnerable to privilege escalation caused by an invalid IBM i Web Administration GUI authorization check. A malicious actor could cause user-controlled code to run with administrator privilege.

EPSS: 0.000 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ibm I — versions 7.2, 7.5, 7.5.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2026-2311?: CVE-2026-2311 is a medium-severity vulnerability in Ibm I, classified under Improper Access Control. CVSS score: 6.4/10. Published 2026-04-30.
How severe is CVE-2026-2311?: Medium severity. CVSS v3 base score is 6.4 out of 10.