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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (8.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-2311: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • IBM I — versions 7.2, 7.5, 7.5.0

Weakness classification (CWE)

References

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.