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CVE Vulnerability Details :
CVE-2026-6338
PUBLISHED
More InfoOfficial Page
Assigner-Kong
Assigner Org ID-02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
View Known Exploited Vulnerability (KEV) details
Published At-11 Jun, 2026 | 13:47
Updated At-11 Jun, 2026 | 14:23
Rejected At-
▼CVE Numbering Authority (CNA)
HTTP request smuggling in Kong Enteprise Gateway

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.

Affected Products
Vendor
Kong
Product
Kong Enterprise Gateway
Platforms
  • Linux
Default Status
unaffected
Versions
Affected
  • From 3.4.0.0 before 3.4.3.27 (kong enteprise gateway 3.4)
  • From 3.10.0.0 before 3.10.0.12 (kong enteprise gateway 3.10)
  • From 3.11.0.0 before 3.11.0.12 (kong enteprise gateway 3.11)
  • From 3.12.0.0 before 3.12.0.7 (kong enteprise gateway 3.12)
  • From 3.13.0.0 before 3.13.0.5 (kong enteprise gateway 3.13)
  • From 3.14.0.0 before 3.14.0.4 (kong enteprise gateway 3.14)
Problem Types
TypeCWE IDDescription
CWECWE-444CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Type: CWE
CWE ID: CWE-444
Description: CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Metrics
VersionBase scoreBase severityVector
4.04.9MEDIUM
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
Version: 4.0
Base score: 4.9
Base severity: MEDIUM
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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-33CAPEC-33 HTTP Request Smuggling
CAPEC ID: CAPEC-33
Description: CAPEC-33 HTTP Request Smuggling
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://support.konghq.com/support/s/article/CVE-2026-6338
vendor-advisory
Hyperlink: https://support.konghq.com/support/s/article/CVE-2026-6338
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found