CVE-2025-30157: Envoy crashes when HTTP ext_proc processes local replies

March 21, 2025

Envoy’s ext_proc HTTP filter is at risk of crashing if a local reply is sent to the external server due to the filter’s life time issue. A known situation is the fail of a websocket handshake will trigger a local reply leading to the crash of Envoy.

References

github.com/advisories/GHSA-cf3q-gqg7-3fm9
github.com/envoyproxy/envoy
github.com/envoyproxy/envoy/commit/8eda1b8ef5ba8663d16a737ab99458c039a9b53c
github.com/envoyproxy/envoy/security/advisories/GHSA-cf3q-gqg7-3fm9
nvd.nist.gov/vuln/detail/CVE-2025-30157

Code Behaviors & Features

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