CVE-2024-34362: Envoyproxy Envoy

Medium severity, CVSS 5.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Envoy is a cloud-native, open source edge and service proxy. There is a use-after-free in `HttpConnectionManager` (HCM) with `EnvoyQuicServerStream` that can crash Envoy. An attacker can exploit this vulnerability by sending a request without `FIN`, then a `RESET_STREAM` frame, and then after receiving the response, closing the connection.

Affected products

• Envoyproxy Envoy: before 1.27.6 (fixed in 1.27.6); from 1.28.0, before 1.28.4 (fixed in 1.28.4); from 1.29.0, before 1.29.5 (fixed in 1.29.5); from 1.30.0, before 1.30.2 (fixed in 1.30.2)

Published 2024-06-04. Last modified 2026-06-17.