high7.5
CVE-2026-48044
Envoy is an open source edge and service proxy designed for cloud-native applications.
Impact
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Envoyproxy | Envoy | from 1.23.0 before 1.35.13 from 1.36.0 before 1.36.9 from 1.37.0 before 1.37.5 from 1.38.0 before 1.38.3 |