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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://support.konghq.com/support/s/article/CVE-2026-6338
Scores
CVSS v4
4.9
EPSS
0.0025
EPSS Percentile
16.3%
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
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-444
Status
published
Products (6)
Kong/Kong Enterprise Gateway
3.10.0.0 - 3.10.0.12
Kong/Kong Enterprise Gateway
3.11.0.0 - 3.11.0.12
Kong/Kong Enterprise Gateway
3.12.0.0 - 3.12.0.7
Kong/Kong Enterprise Gateway
3.13.0.0 - 3.13.0.5
Kong/Kong Enterprise Gateway
3.14.0.0 - 3.14.0.4
Kong/Kong Enterprise Gateway
3.4.0.0 - 3.4.3.27
Published
Jun 11, 2026
Tracked Since
Jun 11, 2026