Race Condition Vulnerability in IBM i WebSocket Handshake Process
CVE-2026-18151

4.2MEDIUM

Key Information:

Vendor

IBM
Status
I
Vendor
CVE Published:
14 September 2026

What is CVE-2026-18151?

A race condition vulnerability exists in the WebSocket handshake process of IBM i versions 7.6, 7.5, 7.4, and 7.3. This flaw could be exploited by a remote, authenticated attacker to gain unauthorized access to sensitive information, posing a risk to the confidentiality of data. Users are advised to review IBM's vendor advisory for remediation options.

Affected Version(s)

i 7.6

i 7.5

i 7.4

References

https://www.ibm.com/support/pages/node/7286974
vendor-advisorypatch

CVSS V3.1

Score:
4.2
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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