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CVE-2026-14916

Kong API Gateway Enterprise: JWT Algorithm-Confusion

HIGH
7.7
CVSS Score
Published: September 16, 2026 at 10:11 AM UTC
Updated: September 18, 2026 at 07:19 PM UTC
1 product affected across 1 vendorEnterprise Gateway

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Severity
HIGH7.7
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Enterprise Gateway· Kong
60%
3.10.0.0 ≤ v < 3.10.0.173.12.0.0 ≤ v < 3.12.0.103.13.0.0 ≤ v < 3.13.0.93.14.0.0 ≤ v < 3.14.0.123.15.0.0 ≤ v < 3.15.0.33.4.0.0 ≤ v < 3.4.3.293.10.0.03.12.0.03.13.0.03.14.0.03.15.0.03.4.0.0
Affected range stops below 3.10.0.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.12.0.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.13.0.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.14.0.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.15.0.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.3.29, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Release Notes
Source: cverecord
https://developer.konghq.com/gateway/changelog/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHKong
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-241

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