CVE-2026-40460

medium F5
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS Score
0.4%
Exploitation probability in 30 days
Top 70% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Published: May 13, 2026 (57 days ago)
Last Modified: June 29, 2026
Vendor: F5
Source: NVD

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.

CWE

CWE-290

Affected Products

f5 dosf5 nginx gateway fabricf5 nginx ingress controllerf5 nginx instance managerf5 nginx open sourcef5 nginx plusf5 waf

References

🔗 my.f5.com