Upcoming security release of Envoy 1.21.1

[Ryan Hamilton]

Hello Envoy Community,

The Envoy security team would like to announce the forthcoming release of Envoy

1.21.1.

This release will be made available on the 22nd of February 2022 at

1200 PDT (1900 GMT). This release will fix 6 security

defect(s). The highest rated security defect is considered High severity.

No further details or patches will be made available in advance of the release.

Thanks,

Ryan Hamilton (on behalf of the Envoy security team and maintainers)