Improper Validation of Array Index in NGINX Gateway Fabric - CVE-2026-32682
Published: June 18, 2026
Vulnerability identifier: #VU134859
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-32682
CWE-ID: CWE-129
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper validation of array index in the GRPCRoute handling logic when processing GRPCRoute configurations containing backendRef filters. A remote user can send a malformed GRPCRoute configuration to cause a denial of service.
The issue affects the control plane only and causes the control plane process to terminate and enter a persistent crash loop while the malformed GRPCRoute resource remains in the cluster.
Affected software
NGINX Gateway Fabric
How to mitigate CVE-2026-32682
Install security update from vendor's website.
NGINX Gateway Fabric - update to 2.6.4