---
id: CVE-2026-14916
title: >-
  A JWT signature verification vulnerability affects Kong components that
  perform JWT validation for MCP OAuth2 or DataKit integrations inside Kong API
  Gateway Enterprise
summary: >-
  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 a…
severity: high
cvss: 7.7
cvssVector: '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'
cwe:
  - CWE-241
vendor: Kong
product: Kong Enteprise Gateway
affected:
  - enteprise_gateway >= 3.15.0.0 < 3.15.0.3
  - enteprise_gateway >= 3.14.0.0 < 3.14.0.12
  - enteprise_gateway >= 3.13.0.0 < 3.13.0.9
  - enteprise_gateway >= 3.12.0.0 < 3.12.0.10
  - enteprise_gateway >= 3.10.0.0 < 3.10.0.17
  - enteprise_gateway >= 3.4.0.0 < 3.4.3.29
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:07:38.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-14916'
references:
  - url: 'https://developer.konghq.com/gateway/changelog/'
    label: 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
tags:
  - nvd
  - cve.org
epss: 0.00668
epssPercentile: 0.5049
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-16T13:26:38.214554Z'
cvssSource: cna
ingestedAt: '2026-09-16T10:53:54.013Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.