CVE-2025-30157: Envoyproxy Envoy

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Envoy is a cloud-native high-performance edge/middle/service proxy. Prior to 1.33.1, 1.32.4, 1.31.6, and 1.30.10, 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 failure of a websocket handshake will trigger a local reply leading to the crash of Envoy. This vulnerability is fixed in 1.33.1, 1.32.4, 1.31.6, and 1.30.10.

Affected products

• Envoyproxy Envoy: before 1.30.10 (fixed in 1.30.10); from 1.31.0, before 1.31.6 (fixed in 1.31.6); from 1.32.0, before 1.32.4 (fixed in 1.32.4); version 1.33.0 only

Published 2025-03-21. Last modified 2026-06-17.