CVE-2026-48044 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-48044HIGH

envoyproxy envoy — Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0032   24.9     —

AFFECTED
  Product  Versions               Fixed
  envoy    >= 1.38.0, < 1.38.1 –  —

TIMELINE
  May 20  Reserved by GitHub_M
  Jun 26  EXPLOIT PUBLISHED — CVE-2026-48044 (envoyproxy envoy). Public exploit reference added.
  Jun 26  Published (CNA: GitHub_M)

CWE-409 · CNA: GitHub_M · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 20, 2026	Reserved	Reserved by GitHub_M
June 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-48044 (envoyproxy envoy). Public exploit reference added.
June 26, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
envoyproxy	envoy	—	>= 1.38.0, < 1.38.1	—

Weaknesses

CWE-409

References (1)

https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg [Mitigation, Vendor Advisory, Exploit]

Authoritative record: CVE-2026-48044 at cve.org

Vendors: envoyproxy

Weaknesses: CWE-409

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-48044 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.