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CVE-2026-48044

HIGH
7.5
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-48044
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-20 18:15 UTC
Published
2026-06-26 17:31 UTC
Last updated
2026-06-26 18:31 UTC
Primary CWE
CWE-409
CWE-409: Improper Handling of Highly Compressed Data (Data A…
Vendor / Product
envoyproxy / envoy
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
envoyproxy envoy — >= 1.38.0, < 1.38.1, >= 1.37.0, < 1.37.3, >= 1.36.0, < 1.36.7, >= 1.23.0, < 1.35.11
Weakness (CWE)
CWESourceDescription
CWE-409 cna CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (1)
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