CVE-2026-17268

Analyzed Analyzed - Analysis Complete

Session Token Bypass in IBM i

Publication date: 2026-08-12

Last updated on: 2026-08-13

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due to improper validation of a session token.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-12

Last Modified

2026-08-13

Generated

2026-09-02

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-31

NVD

CVE-2026-17268

EUVD

EUVD-2026-57362

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	From 7.3 (inc) to 7.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-294	A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

Attack-Flow Graph

Executive Summary

This vulnerability in IBM i 7.6, 7.5, 7.4, and 7.3 allows a remote authenticated attacker to bypass security restrictions. It occurs due to improper validation of a session token, which means the system fails to correctly verify user permissions during sessions.

Detection Guidance

Detection of this vulnerability requires checking for improper session token validation in IBM i systems. Review IBM i access logs for unusual session activity or failed authentication attempts. Monitor network traffic for unexpected connections to IBM i services. Ensure all IBM i systems are updated to the latest fix levels provided by IBM.

Impact Analysis

An attacker could exploit this to gain unauthorized access to sensitive data or perform actions beyond their intended permissions. This may lead to data breaches, unauthorized modifications, or other malicious activities depending on the attacker's goals.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations by enabling unauthorized access to personal or sensitive data. Organizations may face legal penalties, reputational damage, and loss of trust due to such security failures.

Mitigation Strategies

Apply the latest IBM i PTFs or updates provided by IBM to address the improper session token validation issue.

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