Quick answers
- Is CVE-2026-18065 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18065 being exploited in the wild.
- How severe is CVE-2026-18065?
- Medium severity, with a CVSS score of 5.3, published 14 September 2026.
- Which products and versions are affected?
- IBM I 7.3 7.3; IBM I 7.4 7.4; IBM I 7.5 7.5; IBM I 7.6 7.6.
- Is there a fix for CVE-2026-18065?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-18065 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-18065?
- Check whether you run IBM I 7.3, IBM I 7.4, IBM I 7.5 or one of the others listed 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.
Technical details
IBM i Navigator for i is vulnerable to an authentication bypass (CWE-290) via improper session IP binding validation. The vulnerability allows a remote, unauthenticated attacker to obtain sensitive information by spoofing or bypassing IP-based session binding mechanisms. The attack requires no authentication, user interaction, or special privileges, making it easily accessible over the network. An attacker can exploit this to assume the identity of legitimate sessions and access confidential data. IBM has released PTF patches for IBM i 7.3, 7.4, 7.5, and 7.6 addressing this vulnerability.
Affected products
- IBM i 7.6 7.6
- IBM i 7.5 7.5
- IBM i 7.4 7.4
- IBM i 7.3 7.3
Timeline
- 2026-09-14: disclosed