CVE-2026-40460 — MEDIUM (6.5)

Vulnerability 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.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-290

References

https://my.f5.com/manage/s/article/K000161068

FAQ

What is CVE-2026-40460?

CVE-2026-40460 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 limit...

How severe is CVE-2026-40460?

CVE-2026-40460 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-40460?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.