CVE-2026-40460

NGINX ngx_quic_module vulnerability

State: Published
Severity: 6.9 Medium
Published: May 13, 2026
Updated: May 13, 2026
Reserved: Apr 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N	f5
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L	f5

Weaknesses

CWE-290 Authentication Bypass by Spoofing

Affected Products

Product	Versions
NGINX PlusF5	R37 and laterNot affected R36 to before R36 P4Affected R32 to before R32 P6Affected
NGINX Open SourceF5	1.31.0 and laterNot affected 1.26.0 to before 1.30.1Affected

References

https://my.f5.com/manage/s/article/K000161068vendor-advisorypatch

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