What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-21 · updated 2026-06-17
• Weakness: CWE-460

Description

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; from 1.31.0 before 1.31.6; from 1.32.0 before 1.32.4; 1.33.0 — fixed in 1.30.10, 1.31.6, 1.32.4

How to fix

Upgrade to a fixed version: envoyproxy envoy 1.30.10, 1.31.6, 1.32.4. Check the vendor advisory for mitigations.

References

• https://github.com/envoyproxy/envoy/commit/8eda1b8ef5ba8663d16a737ab99458c039a9b53c
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-cf3q-gqg7-3fm9
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-cf3q-gqg7-3fm9

Get alerted when CVE-2025-30157 or the next vulnerability affects your stack