Quick answers
- Is CVE-2026-18076 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18076 being exploited in the wild.
- How severe is CVE-2026-18076?
- Medium severity, with a CVSS score of 4.3, published 4 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-2026-18076?
- 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-2026-18076 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-18076?
- 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 versions 7.6, 7.5, 7.4, and 7.3 contain a memory leak vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) in the Debug Server component. An authenticated attacker with remote network access can trigger the memory leak condition, causing the affected system to consume memory until resources are exhausted, resulting in denial of service. Authentication is required to exploit this vulnerability. IBM has released PTFs (Program Temporary Fixes) for all affected versions: SJ11305 (7.6), SJ11306 (7.5), SJ11307 (7.4), and SJ11308 (7.3).
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
- 2026-09-04: disclosed