CVE-2026-32682: CWE-129 Improper Validation of Array Index in F5 NGINX Gateway Fabric
CVE-2026-32682 is a medium severity vulnerability in F5 NGINX Gateway Fabric version 1.3.0. It involves improper validation of array indexes (CWE-129) when the product is configured with GRPCRoutes. An authenticated remote attacker with permissions to create or modify GRPCRoute resources can cause the control plane to terminate by submitting crafted GRPCRoute configurations containing backendRef filters. This results in a denial of service condition. No patch or official remediation guidance is currently provided by the vendor.
AI Analysis
Technical Summary
The vulnerability CVE-2026-32682 affects F5 NGINX Gateway Fabric 1.3.0 when configured with GRPCRoutes. It stems from improper validation of array indexes (CWE-129) in the handling of backendRef filters within GRPCRoute configurations. An authenticated attacker with permission to create or modify GRPCRoute resources can exploit this flaw to cause the control plane to terminate, leading to denial of service. The vulnerability does not impact confidentiality or integrity but affects availability. There is no vendor-provided patch or remediation level at this time, and the software version affected has not reached End of Technical Support.
Potential Impact
Successful exploitation results in denial of service by causing the NGINX Gateway Fabric control plane to terminate. There is no impact on confidentiality or integrity. The attacker must be authenticated and have permissions to create or modify GRPCRoute resources.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict permissions to create or modify GRPCRoute resources to trusted administrators only to reduce risk.
CVE-2026-32682: CWE-129 Improper Validation of Array Index in F5 NGINX Gateway Fabric
Description
CVE-2026-32682 is a medium severity vulnerability in F5 NGINX Gateway Fabric version 1.3.0. It involves improper validation of array indexes (CWE-129) when the product is configured with GRPCRoutes. An authenticated remote attacker with permissions to create or modify GRPCRoute resources can cause the control plane to terminate by submitting crafted GRPCRoute configurations containing backendRef filters. This results in a denial of service condition. No patch or official remediation guidance is currently provided by the vendor.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/f5/nginx-gateway-fabricRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-32682 affects F5 NGINX Gateway Fabric 1.3.0 when configured with GRPCRoutes. It stems from improper validation of array indexes (CWE-129) in the handling of backendRef filters within GRPCRoute configurations. An authenticated attacker with permission to create or modify GRPCRoute resources can exploit this flaw to cause the control plane to terminate, leading to denial of service. The vulnerability does not impact confidentiality or integrity but affects availability. There is no vendor-provided patch or remediation level at this time, and the software version affected has not reached End of Technical Support.
Potential Impact
Successful exploitation results in denial of service by causing the NGINX Gateway Fabric control plane to terminate. There is no impact on confidentiality or integrity. The attacker must be authenticated and have permissions to create or modify GRPCRoute resources.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict permissions to create or modify GRPCRoute resources to trusted administrators only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-06-17T16:35:56.342Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a33019af198dc38c1fe193c
Added to database: 6/17/2026, 8:20:42 PM
Last enriched: 6/17/2026, 8:35:19 PM
Last updated: 6/17/2026, 9:24:57 PM
Views: 7
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