Authenticated GRPCRoute Misconfiguration Leading to NGINX Gateway Fabric Control Plane Termination

Publication date: 2026-06-17

Last updated on: 2026-07-02

Assigner: F5 Networks

Description

When NGINX Gateway Fabric is configured using GRPCRoutes, an authenticated, remote attacker with permission to create or modify GRPCRoute resources can cause the NGINX Gateway Fabric control plane to terminate by sending undisclosed GRPCRoute configurations containing backendRef filters. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

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Meta Information

Published

2026-06-17

Last Modified

2026-07-02

Generated

2026-07-08

AI Q&A

2026-06-18

EPSS Evaluated

2026-07-06

NVD

CVE-2026-32682

Affected Vendors & Products

Vendor	Product	Version / Range
f5	nginx_gateway_fabric	From 1.3.0 (inc) to 1.6.2 (inc)
f5	nginx_gateway_fabric	From 2.0.0 (inc) to 2.6.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-129	The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

Attack-Flow Graph

Executive Summary

This vulnerability occurs in NGINX Gateway Fabric when it is configured using GRPCRoutes. An authenticated remote attacker who has permission to create or modify GRPCRoute resources can exploit this issue by sending specially crafted GRPCRoute configurations that include backendRef filters. This causes the NGINX Gateway Fabric control plane to terminate unexpectedly.

Impact Analysis

The impact of this vulnerability is that an attacker with certain permissions can cause the NGINX Gateway Fabric control plane to terminate. This termination can disrupt the normal operation of the gateway fabric, potentially leading to denial of service or interruption of services relying on the control plane.

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