CVE-2024-23324: Envoyproxy Envoy

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections. Downstream clients can force invalid gRPC requests to be sent to ext_authz, circumventing ext_authz checks when failure_mode_allow is set to true. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Envoyproxy Envoy: from 1.26.0, before 1.26.7 (fixed in 1.26.7); from 1.27.0, before 1.27.3 (fixed in 1.27.3); from 1.28.0, before 1.28.1 (fixed in 1.28.1); from 1.29.0, before 1.29.1 (fixed in 1.29.1)

Published 2024-02-09. Last modified 2026-06-17.