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CVE-2026-14916— Kong API Gateway Enterprise: JWT Algorithm-Confusion

Quick assessment

Affected
Kong Kong Enteprise Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kong API Gateway Enterprise 中负责 MCP OAuth2 或 DataKit 集成中 JWT 校验的组件存在 JWT 签名验证漏洞。受影响的代码未能正确验证 JWT 签名算法是否与用于验证的密钥类型相匹配。 因此，未认证的远程攻击者可能能够构造一个被错误接受为有效的伪造 JWT，从而导致认证绕过，并可能造成机密性、完整性和可用性的潜在损害。

CVSS 7.7 · High EPSS 0.70% · P53

Possible ATT&CK Techniques 1 AI

T1531 · Account Access Removal

Affected Version Matrix 6

VendorProduct Version RangeStatus
Kong Kong Enteprise Gateway 3.15.0.0< 3.15.0.3 affected
3.14.0.0< 3.14.0.12 affected
3.13.0.0< 3.13.0.9 affected
3.12.0.0< 3.12.0.10 affected
3.10.0.0< 3.10.0.17 affected
3.4.0.0< 3.4.3.29 affected
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I. Basic Information for CVE-2026-14916

Vulnerability Information
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Vulnerability Title
Kong API Gateway Enterprise: JWT Algorithm-Confusion
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
非预期数据类型处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kong Kong Enteprise Gateway 3.15.0.0 ~ 3.15.0.3 -

II. Public POCs for CVE-2026-14916

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III. Intelligence Information for CVE-2026-14916

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Other References for CVE-2026-14916 (1)

IV. Related Vulnerabilities

Same vendor: Kong
Same weakness: CWE-241