CVE-2026-6338
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HTTP Request Smuggling in Kong Gateway Enterprise
Vulnerability report for CVE-2026-6338, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-06-11
Last updated on: 2026-06-11
Assigner: Kong
Description
Description
A HTTP request smuggling and desynchronization vulnerability affects Kong Gateway Enterprise 3.4, 3.10, 3.11, 3.12, 3.13, and 3.14 series. The vulnerability is caused by a parsing flaw in Kong’s HTTP request processing pipeline when handling untrusted HTTP/1.1 traffic.
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| kong | gateway_enterprise | 3.4 |
| kong | gateway_enterprise | 3.10 |
| kong | gateway_enterprise | 3.11 |
| kong | gateway_enterprise | 3.12 |
| kong | gateway_enterprise | 3.13 |
| kong | gateway_enterprise | 3.14 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-444 | The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. |
