CVE-2020-8660: Envoyproxy Envoy

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

CNCF Envoy through 1.13.0 TLS inspector bypass. TLS inspector could have been bypassed (not recognized as a TLS client) by a client using only TLS 1.3. Because TLS extensions (SNI, ALPN) were not inspected, those connections might have been matched to a wrong filter chain, possibly bypassing some security restrictions in the process.

Affected products

• Envoyproxy Envoy: before 1.12.3 (fixed in 1.12.3); from 1.13.0, before 1.13.1 (fixed in 1.13.1)

Published 2020-03-04. Last modified 2026-06-17.