v1.36.8

envoyproxy/envoyv1.36.8Jun 10, 2026by publish-envoy[bot]

AI Summary

A minor release focusing on HTTP/2 header statistics and bug fixes for runtime guard overrides.

Key Highlights

Added opt-in histograms for HTTP/2 header statistics.
Added runtime guard to limit reassembled cookie header size.
Fixed RTDS runtime guard override removal.

New Features

HTTP/2 header statistics histograms (header-entry count, header-map byte size, cookie length/count).
Runtime guard `envoy.reloadable_features.http2_max_cookies_size_in_kb`.

Full Release Notes

**Summary of changes**:

* Bug fixes:
  - runtime: fixed RTDS runtime guard override removal so deleting an override restores the process-wide runtime guard value to the default value.

* New features:
  - http2: added opt-in histograms for HTTP/2 header statistics, including header-entry count, header-map byte size, reassembled ``cookie`` header length, and individual ``cookie`` header count. Enable with ``envoy.reloadable_features.http2_record_histograms``; the histograms and runtime guard will be removed in a future Envoy release.
  - http2: added ``envoy.reloadable_features.http2_max_cookies_size_in_kb`` to limit the size of the reassembled ``cookie`` header. By default, no cookie-size limit is enforced.

**Docker images**:
    https://hub.docker.com/r/envoyproxy/envoy/tags?page=1&name=v1.36.8
**Docs**:
    https://www.envoyproxy.io/docs/envoy/v1.36.8/
**Release notes**:
    https://www.envoyproxy.io/docs/envoy/v1.36.8/version_history/v1.36/v1.36.8
**Full changelog**:
    https://github.com/envoyproxy/envoy/compare/v1.36.7...v1.36.8

Signed-off-by: Ryan Northey [ryan@synca.io](mailto:ryan@synca.io)
Signed-off-by: Kateryna Nezdolii [kateryna.nezdolii@gmail.com](mailto:kateryna.nezdolii@gmail.com)