Quick answers
- Is CVE-2026-18689 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18689 being exploited in the wild.
- How severe is CVE-2026-18689?
- Medium severity, with a CVSS score of 4.3, published 7 November 2026.
- Which products and versions are affected?
- IBM API Connect 10.0.8.0 through 10.0.8.12, 12.1.0.0 through 12.1.1.2.
- Is there a fix for CVE-2026-18689?
- 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-2026-18689 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-18689?
- Check whether you run IBM API Connect 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
The vulnerability is an incomplete token validation flaw where a token issued for a limited purpose is accepted in contexts where it should be rejected. An authenticated attacker can send a token that does not have authorization for a given request, but the authorization check fails to detect this mismatch. The issue affects the security boundary between organizations.
Affected products
- IBM API Connect 10.0.8.0 through 10.0.8.12, 12.1.0.0 through 12.1.1.2
Timeline
- 2026-11-07: disclosed