Quick answers
- Is CVE-2026-18318 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18318 being exploited in the wild.
- How severe is CVE-2026-18318?
- Medium severity, with a CVSS score of 5.3, published 13 October 2026.
- Which products and versions are affected?
- IBM i 7.3, 7.4, 7.5, 7.6.
- Is there a fix for CVE-2026-18318?
- Yes: fixed in IBM i 7.6 with PTF MJ11636 or MJ11441; IBM i 7.5 with PTF MJ11635 or MJ11439; IBM i 7.4 with PTF MJ11634 or MJ11438; IBM i 7.3 with PTF MJ11633 or MJ11448. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-18318 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-18318?
- Check whether you run IBM I or 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 MJ11636 or MJ11441; IBM i 7.5 with PTF MJ11635 or MJ11439; IBM i 7.4 with PTF MJ11634 or MJ11438; IBM i 7.3 with PTF MJ11633 or MJ11448
Technical details
The vulnerability stems from improper restriction of excessive authentication attempts (CWE-307), allowing remote attackers to conduct unrestricted brute-force attacks on credentials. No authentication or user interaction is required; the attack is purely network-based and unauthenticated. Successful exploitation allows an attacker to obtain valid user credentials and gain unauthorized access to the system.
Affected products
- IBM IBM i 7.3, 7.4, 7.5, 7.6
Timeline
- 2026-09-29: disclosed
- 2026-10-13: advisory