CVE-2026-40460: NGINX ngx_quic_module vulnerability
Last updated 2 June 2026
Other sources
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.
— NVD
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/nginxto a version that resolves this vulnerability.Fixed in 1.18.0-6.1+deb11u3Fixed in 1.18.0-6.1+deb11u6Fixed in 1.22.1-9+deb12u6Fixed in 1.22.1-9+deb12u7Fixed in 1.26.3-3+deb13u5Fixed in 1.30.1-3
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40460?
CVE-2026-40460 has a high severity rating due to its potential for IP address spoofing and authorization bypass.
How do I fix CVE-2026-40460?
To fix CVE-2026-40460, update your NGINX Plus or NGINX Open Source to a version that addresses this vulnerability.
What kind of configurations are affected by CVE-2026-40460?
CVE-2026-40460 affects configurations where NGINX Plus or NGINX Open Source are set to use the HTTP/3 QUIC module.
Can CVE-2026-40460 lead to any security breaches?
Yes, exploiting CVE-2026-40460 can lead to unauthorized access or denial of service due to bypassing rate limiting.
Is there a workaround for CVE-2026-40460?
A potential workaround for CVE-2026-40460 is to disable the HTTP/3 QUIC module until the software is updated.