CVE-2026-32682Network attack vector

Control-plane crash via crafted GRPCRoute backendRef filters

Published Jun 17, 2026 · Updated Jun 17, 2026

Improper array-index validation in F5 NGINX Gateway Fabric 1.3.0 through 2.6.3 allows remote authenticated users to crash the control plane. A GRPCRoute containing backendRef filters reaches an improperly validated array index, but F5 has not disclosed the affected function or exact index operation. Reachability requires GRPCRoutes to be enabled and Kubernetes permission to create or modify them; successful exploitation terminates the control plane without reported data disclosure or modification.

CVSS severity7.1
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in F5 NGINX Gateway Fabric 1.3.0 through 2.6.3 allows remote authenticated users to crash the control plane. A GRPCRoute containing backendRef filters reaches an improperly validated array index, but F5 has not disclosed the affected function or exact index operation. Reachability requires GRPCRoutes to be enabled and Kubernetes permission to create or modify them; successful exploitation terminates the control plane without reported data disclosure or modification.

The record

CVE
CVE-2026-32682
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
F5 Networks
Product
NGINX Gateway Fabric
Classifications
CWE-129, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.0 <2.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

F5 Networks · NGINX Gateway Fabricversion=1.3.0 <2.6.4

Published CVSS scores

7.1F5CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5F5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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