Description
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, when Envoy is configured in TCP proxy mode to handle CONNECT requests, it accepts client data before issuing a 2xx response and forwards that data to the upstream TCP connection. If a forwarding proxy upstream from Envoy then responds with a non-2xx status, this can cause a de-synchronized CONNECT tunnel state. By default Envoy continues to allow early CONNECT data to avoid disrupting existing deployments. The envoy.reloadable_features.reject_early_connect_data runtime flag can be set to reject CONNECT requests that send data before a 2xx response when intermediaries upstream from Envoy may reject establishment of a CONNECT tunnel.
INFO
Published Date :
2025-12-03T18:13:58.496Z
Last Modified :
2025-12-03T20:02:40.284Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2025-64763 vulnerability.
| Vendors | Products |
|---|---|
| Envoyproxy |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-64763.
