What’s Vulnerable › Vulnerabilities
CVE-2026-14916: Kong API Gateway Enterprise: JWT Algorithm-Confusion
- Severity: high (CVSS 7.7 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-18
- Weakness: CWE-241
Description
A JWT signature verification vulnerability affects Kong components that perform JWT validation for MCP OAuth2 or DataKit integrations inside Kong API Gateway Enterprise. The affected code does not properly validate that the JWT signing algorithm is compatible with the type of key used for verification. As a result, an unauthenticated remote attacker may be able to craft a forged JWT that is incorrectly accepted as valid, leading to authentication bypass and potential compromise of confidentiality, integrity, and availability.
Affected products
- Kong Enteprise Gateway: from 3.15.0.0 before 3.15.0.3; from 3.14.0.0 before 3.14.0.12; from 3.13.0.0 before 3.13.0.9; from 3.12.0.0 before 3.12.0.10; from 3.10.0.0 before 3.10.0.17; from 3.4.0.0 before 3.4.3.29 — fixed in 3.10.0.17, 3.12.0.10, 3.13.0.9, 3.14.0.12, 3.15.0.3, 3.4.3.29
How to fix
Upgrade to a fixed version: Kong Enteprise Gateway 3.10.0.17, 3.12.0.10, 3.13.0.9, 3.14.0.12. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-14916 or the next vulnerability affects your stack