Quick answers
- Is CVE-2026-19121 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19121 being exploited in the wild.
- How severe is CVE-2026-19121?
- High severity, with a CVSS score of 8.3, published 7 November 2026.
- Which products and versions are affected?
- IBM API Connect 12.1.0.0 through 12.1.1.2.
- Is there a fix for CVE-2026-19121?
- Yes: fixed in 12.1.1.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-19121 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-19121?
- 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.
How to fix
- Fixed in: 12.1.1.3
Technical details
The vulnerability is an improper authorization flaw where tenant context is not sufficiently verified against the authenticated user, allowing access to another tenant's resources. It requires prior authentication but no additional user interaction. An attacker gains unauthorized access to cross-tenant data within the same API Connect deployment.
Affected products
- IBM API Connect 12.1.0.0 through 12.1.1.2
Timeline
- 2026-11-07: disclosed