CVE-2026-6338

HTTP request smuggling in Kong Enteprise Gateway

Published Jun 11, 2026 CVSS 4.0 · 4.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Kong
Kong kong Enterprise Gateway
Vendors & Products Kong
Kong kong Enterprise Gateway
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title HTTP request smuggling in Kong Enteprise Gateway
Weaknesses CWE-444
References
Metrics cvssV4_0

{'score': 4.9, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Kong
Published
Updated
Jun 11, 2026, 2:23 PM
Reserved
Apr 15, 2026, 10:07 AM
Status
Awaiting Analysis
Published
Jun 11, 2026, 2:16 PM
Modified
Oct 26, 2026, 11:10 AM