CVE-2026-18251
Received Received - Intake

IBM i WebSocket Origin Validation Information Disclosure

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: IBM Corporation

Description
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 Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-18251
EUVD
EUVD-2026-77779

Affected Vendors & Products

Showing 8 associated CPEs
Vendor Product Version / Range
ibm i 7.6
ibm i 7.5
ibm i 7.4
ibm i 7.3
ibm ibm_i From 7.6 (inc)
ibm ibm_i From 7.5 (inc)
ibm ibm_i From 7.4 (inc)
ibm ibm_i From 7.3 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-1385 The product uses a WebSocket, but it does not properly verify that the source of data or communication is valid.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

IBM i 7.6, 7.5, 7.4, and 7.3 are vulnerable to a flaw where improper validation of the WebSocket origin allows remote attackers to obtain sensitive information. This occurs because the system fails to correctly verify the origin of WebSocket connections.

Impact Analysis

This vulnerability could allow attackers to access sensitive data transmitted over WebSocket connections. If exploited, it may lead to unauthorized disclosure of confidential information, potentially affecting data integrity and confidentiality.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by exposing sensitive personal or health data. GDPR requires protection of personal data, while HIPAA mandates safeguards for protected health information. A breach could result in legal penalties and reputational damage.

Mitigation Strategies

Apply IBM i PTFs or updates to address the improper WebSocket origin validation. Monitor IBM's security advisories for patches. Restrict WebSocket connections to trusted origins if possible.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-18251. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart