Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections. Downstream clients can force invalid gRPC requests to be sent to ext_authz, circumventing ext_authz checks when failure_mode_allow is set to true. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Envoy | Envoyproxy | 1.26.0 (including) | 1.26.7 (excluding) |
| Envoy | Envoyproxy | 1.27.0 (including) | 1.27.3 (excluding) |
| Envoy | Envoyproxy | 1.28.0 (including) | 1.28.1 (excluding) |
| Envoy | Envoyproxy | 1.29.0 (including) | 1.29.1 (excluding) |