BIT-ENVOY-2026-48044 Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion

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...

PT-2026-52889

Name of the Vulnerable Software and Affected Versions Envoy versions 1.23.0 through 1.35.10 Envoy versions 1.36.0 through 1.36.6 Envoy versions 1.37.0 through 1.37.2 Envoy versions 1.38.0 through 1.38.0 Description A flaw exists in the zstd decompressor implementation ZstdDecompressorImpl. When...