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    <lastBuildDate>Fri, 02 Oct 2026 18:35:00 +0000</lastBuildDate>
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      <title>CVE-2026-48044 — Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-48044</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; envoyproxy envoy&lt;/p&gt;
&lt;p&gt;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&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; envoyproxy envoy&lt;/p&gt;
&lt;p&gt;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&amp;#39;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.&lt;/p&gt;</content:encoded>
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