---
id: CVE-2026-40460
title: "When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC\_module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.\_\_Note: Software versions which h…"
summary: "When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC\_module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.\_\_Note: Software versions which h…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'
cwe:
  - CWE-290
published: '2026-05-13'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40460'
references:
  - url: 'https://my.f5.com/manage/s/article/K000161068'
    label: f5sirt@f5.com
tags:
  - nvd
epss: 0.00373
epssPercentile: 0.31259
ingestedAt: '2026-06-29T14:29:18.094Z'
---

## Overview

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.