Provide references for CVE-2021-32781.
Where can I find more information about CVE-2021-32781?
References are available at: https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history, https://github.com/envoyproxy/envoy/security/advisories/GHSA-5vhv-gp9v-42qv.