CVE-2026-40460 MEDIUM

CVE-2026-40460: NGINX ngx_quic_module vulnerability

Vendor F5
Product NGINX Plus
Weakness CWE-290
Published May 13, 2026
Last update May 13, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

What the vulnerability does

Description

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.

Key dates

Disclosure timeline

May 13, 2026 CVE published
May 13, 2026 Record updated