CVE-2026-6338

June 11, 2026, 3:32 p.m.

4.9
Medium

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.

Product(s) Impacted

Vendor Product Versions
Kong
  • Kong Gateway Enterprise
  • 3.4, 3.10, 3.11, 3.12, 3.13, 3.14

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
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.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a kong kong_gateway_enterprise 3.4 / / / / / / /
a kong kong_gateway_enterprise 3.10 / / / / / / /
a kong kong_gateway_enterprise 3.11 / / / / / / /
a kong kong_gateway_enterprise 3.12 / / / / / / /
a kong kong_gateway_enterprise 3.13 / / / / / / /
a kong kong_gateway_enterprise 3.14 / / / / / / /

References

https://support.konghq.com/support/s/article/CVE-2026-6338

Tags

CWE-444
02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
2026-06-11
CVE-2026-6338

CVSS Score

4.9 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: PRESENT
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: PROOF_OF_CONCEPT

    • 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:M/U:X

    View Vector String

Timeline

Published: June 11, 2026, 2:16 p.m.
Last Modified: June 11, 2026, 3:32 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

02762ae7-200e-4b20-9b2b-a77d5b8fc4cb

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.