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CVE-2026-6338— HTTP request smuggling in Kong Enteprise Gateway

Quick assessment

Affected
Kong Kong Enterprise 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 Gateway Enterprise是Kong公司的一个企业级API网关平台。 Kong Gateway Enterprise 3.4版本、3.10版本、3.11版本、3.12版本、3.13版本和3.14版本存在环境问题漏洞，该漏洞源于HTTP请求处理管道解析缺陷，可能导致HTTP请求夹带和反序列化攻击。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.49% · P40

Affected Version Matrix 6

VendorProduct Version RangeStatus
Kong Kong Enterprise Gateway 3.4.0.0< 3.4.3.27 affected
3.10.0.0< 3.10.0.12 affected
3.11.0.0< 3.11.0.12 affected
3.12.0.0< 3.12.0.7 affected
3.13.0.0< 3.13.0.5 affected
3.14.0.0< 3.14.0.4 affected
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I. Basic Information for CVE-2026-6338

Vulnerability Information
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Vulnerability Title
HTTP request smuggling in Kong Enteprise Gateway
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:P/R:A/RE:M
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Kong Gateway Enterprise 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kong Gateway Enterprise是Kong公司的一个企业级API网关平台。 Kong Gateway Enterprise 3.4版本、3.10版本、3.11版本、3.12版本、3.13版本和3.14版本存在环境问题漏洞，该漏洞源于HTTP请求处理管道解析缺陷，可能导致HTTP请求夹带和反序列化攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kong Kong Enterprise Gateway 3.4.0.0 ~ 3.4.3.27 -

II. Public POCs for CVE-2026-6338

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III. Intelligence Information for CVE-2026-6338

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Vendor Advisories for CVE-2026-6338 (1)

IV. Related Vulnerabilities

Same product: Kong Enterprise Gateway
Same vendor: Kong
Same weakness: CWE-444

V. Comments for CVE-2026-6338

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