Findings

CVE-2026-40460

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 auth…

Published May 13, 2026 · updated Jun 29, 2026 · f5 dos

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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2026 · NIST NVD

    Detected

    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.

  2. Jun 29, 2026 · NIST NVD

    Updated

    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.

Affected

  • cpe f5/dosversion unspecified
  • cpe f5/dos4.8.0
  • cpe f5/nginx gateway fabricversion unspecified
  • cpe f5/nginx ingress controllerversion unspecified
  • cpe f5/nginx instance managerversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-40460

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-40460

    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)

    nvd.nist.gov

References