v1.38.2

anthropics/anthropic-tokenizer-typescriptv1.38.2Jun 10, 2026by publish-envoy[bot]

AI Summary

A maintenance release fixing an RTDS runtime guard override bug and adding opt-in HTTP/2 histogram statistics for monitoring header sizes and cookie lengths.

Key Highlights

Fixed RTDS runtime guard override removal logic
Added HTTP/2 header statistics histograms (entry count, map size, cookie length/count)
Added environment variable to limit reassembled cookie header size

New Features

HTTP/2 header statistics histograms
Cookie size limit configuration

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=v1.38.2
**Docs**:
    https://www.envoyproxy.io/docs/envoy/v1.38.2/
**Release notes**:
    https://www.envoyproxy.io/docs/envoy/v1.38.2/version_history/v1.38/v1.38.2
**Full changelog**:
    https://github.com/envoyproxy/envoy/compare/v1.38.1...v1.38.2

Signed-off-by: Ryan Northey <ryan@synca.io>
Signed-off-by: Kateryna Nezdolii <kateryna.nezdolii@gmail.com>