CVE-2026-93744: IBM i Navigator authentication bypass via improper access control

CVE-2026-93744 · Severity: medium · CVSS 6.5 · Published 2026-10-20

IBM Navigator for i is an administrative interface used to manage IBM i servers, which run mission-critical business applications. An unauthenticated attacker can bypass security restrictions by sending specially crafted HTTP requests before logging in, allowing them to manipulate session security settings and gain unauthorized access to the system. This could enable an attacker to compromise sensitive business data or take control of the server.

Technologies: IBM I. Vendors: IBM.

Quick answers

Is CVE-2026-93744 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-93744 being exploited in the wild.
How severe is CVE-2026-93744?
Medium severity, with a CVSS score of 6.5, published 20 October 2026.
Which products and versions are affected?
IBM I 7.3, 7.4, 7.5, 7.6.
Is there a fix for CVE-2026-93744?
Yes: fixed in IBM i 7.6 with PTF SJ11740, 7.5 with PTF SJ11745, 7.4 with PTF SJ11746, 7.3 with PTF SJ11747. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-93744 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-93744?
Check whether you run IBM I at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: IBM i 7.6 with PTF SJ11740, 7.5 with PTF SJ11745, 7.4 with PTF SJ11746, 7.3 with PTF SJ11747

Technical details

The vulnerability is an improper authentication issue (CWE-287) in the IBM Navigator for i component of IBM i systems. An unauthenticated remote attacker can send a specially crafted HTTP request to any Navigator URL prior to authentication, which alters server-side session security state and bypasses access controls. No special privileges or user interaction are required; the attack is carried out over the network.

Affected products

  • IBM i 7.3, 7.4, 7.5, 7.6

Timeline

  • 2026-10-20: disclosed

References

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