CVE-2026-48042: Envoyproxy Envoy

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

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, destructor of JSON Object results in stack overflow when deeply O(100K) nested objects are present. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

Affected products

• Envoyproxy Envoy: from 1.18.0, before 1.35.13 (fixed in 1.35.13); from 1.36.0, before 1.36.9 (fixed in 1.36.9); from 1.37.0, before 1.37.5 (fixed in 1.37.5); from 1.38.0, before 1.38.3 (fixed in 1.38.3)

Published 2026-06-26. Last modified 2026-06-29.