9.8

CVE-2026-2311: ibm i Improper Access Control

CVSS: 9.8v3.1CriticalAnalyzed
Published 30-04-2026Last modified 02-05-2026
Open JSON

Vulnerability summary

CVE-2026-2311 is a critical (CVSS 9.8) Improper Access Control vulnerability in ibm i. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-04-2026
    PublishedVulnerability first disclosed.
  2. 02-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm1 product
  • i≥ 7.6.0, ≤ 2.3.0 | 7.5.0 | 7.4.0 | 7.3.0 | 7.2.0 | 7.2 | 7.3 | 7.4 | 7.5 | 7.6

1 vendor · 1 product

References

1 links