CVE-2026-40460
MediumPublished
NGINX ngx_quic_module vulnerability
- Published
- May 13, 2026
- Updated
- May 13, 2026
- Assigning CNA
- f5
- Evidence observed
- Aug 28, 2026
Primary CVSS
6.9/ 10Medium
nvd · CVSS 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X0.4%
Low · next 30 days
- Percentile
- 31.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
- nGixshellUnknown
nginx CVE scanner + RCE exploit framework (CVE-2026-42945 + 16 others)
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.