CVE-2026-6338 HTTP request smuggling in Kong Enteprise Gateway
Attackers can exploit HTTP request smuggling in Kong Enterprise Gateway to desynchronize traffic, potentially bypassing security controls or accessing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6338?
CVE-2026-6338 is a medium-severity vulnerability in Kong Enterprise Gateway, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-444
Which versions are affected by CVE-2026-6338?
How do I fix CVE-2026-6338?
No fix has been published for CVE-2026-6338 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6338 being exploited?
There is no known exploitation of CVE-2026-6338 in the wild and no public exploit code.
Sources
Also known as GHSA-mj44-8qq5-6386.