CVE-2026-14916

Kong API Gateway Enterprise: JWT Algorithm-Confusion

Published Sep 16, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Kong
Kong kong Enterprise Gateway
Vendors & Products Kong
Kong kong Enterprise Gateway
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Kong API Gateway Enterprise: JWT Algorithm-Confusion
Weaknesses CWE-241
References
Metrics cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Kong
Published
Updated
Sep 16, 2026, 1:26 PM
Reserved
Jul 7, 2026, 7:14 AM
Status
Awaiting Analysis
Published
Sep 16, 2026, 11:16 AM
Modified
Sep 18, 2026, 7:07 PM