Medium6.5Red Hat Linux

Medium [CVE-2026-40460] Authorization bypass via IP spoofing in HTTP/3 QUIC module

This medium-severity Red Hat Linux advisory covers CVE-2026-40460 affecting nginx-main, Red Hat Enterprise Linux.

CVE-2026-40460 Published May 13, 2026

CVE-2026-40460

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Authorization bypass via IP spoofing in HTTP/3 QUIC module. Red Hat rates this moderate (CVSS 6.5).

Weakness: CWE-290. Affected package(s): nginx-main.

Resolved in Red Hat advisory RHSA-2026:20351 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux.

Affected versions

nginx-main-1.30.2-1.hum1

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:20351

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:20351 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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