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TI-2026-05559 Aliases CVE-2026-6338GHSA-mj44-8qq5-6386

HTTP request smuggling in Kong Enteprise Gateway

Priority LOW 22CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed Kong Enterprise Gateway (Kong): 3.4.3.27, 3.10.0.12, 3.11.0.12 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Kong Inc.Kong Enterprise Gateway3.4.0.0 to before 3.4.3.27; 3.10.0.0 to before 3.10.0.12; 3.11.0.0 to before 3.11.0.12; 3.12.0.0 to before 3.12.0.7; 3.13.0.0 to before 3.13.0.5; 3.14.0.0 to before 3.14.0.43.4.3.27, 3.10.0.12, 3.11.0.12, 3.12.0.7, 3.13.0.5, 3.14.0.4Patch availableCNA
  • Kong Enterprise Gateway VendorKong Inc. Affected 3.4.0.0 to before 3.4.3.27; 3.10.0.0 to before 3.10.0.12; 3.11.0.0 to before 3.11.0.12; 3.12.0.0 to before 3.12.0.7; 3.13.0.0 to before 3.13.0.5; 3.14.0.0 to before 3.14.0.4 Fixed in 3.4.3.27, 3.10.0.12, 3.11.0.12, 3.12.0.7, 3.13.0.5, 3.14.0.4 Patch available CNA

Remediation

  • Fix · CNA Kong Enterprise Gateway (Kong) Fixed in 3.4.3.27, 3.10.0.12, 3.11.0.12, 3.12.0.7, 3.13.0.5, 3.14.0.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6338
  2. 2026-10-03 Alias added: GHSA-mj44-8qq5-6386

References

Advisory 1

  • TI-2020-17871 The official kong docker images before 1.0.2-alpine (Alpine specific) contain a blank… CVSS 3.1CRITICAL 9.8
  • TI-2025-00925 Arbitrary Code Execution in Kong Insomnia Desktop Application CVSS 4.0CRITICAL 9.3
  • TI-2026-12562 Kong API Gateway Enterprise: SAML Authentication bypass CVSS 4.0HIGH 7.7
  • TI-2026-12561 Kong API Gateway Enterprise: JWT Algorithm-Confusion CVSS 4.0HIGH 7.7
  • TI-2020-18854 Kong lua-multipart multipart.lua is_header redos CVSS 3.1HIGH 7.5
  • TI-2026-70893 SQL injection in Kong Gateway clustering communication CVSS 4.0HIGH 7.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences