Quick answers
- Is CVE-2026-17399 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-17399 being exploited in the wild.
- How severe is CVE-2026-17399?
- Critical severity, with a CVSS score of 9.9, published 7 November 2026.
- Which products and versions are affected?
- IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2.
- Is there a fix for CVE-2026-17399?
- 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-2026-17399 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-17399?
- 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 arbitrary code execution flaw in API Connect versions 10.0.8.0–10.0.8.12 and 12.1.0.0–12.1.1.2, caused by insufficient validation of uploaded content before processing. An authenticated attacker can exploit this by uploading specially crafted files that execute as code on the server. The attack requires authentication but no user interaction.
Affected products
- IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2
Timeline
- 2026-11-07: disclosed