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      <title>CVE-2026-83599 — Netdata: WebSocket Decompression Bomb</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-83599</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; netdata&lt;/p&gt;
&lt;p&gt;Netdata is an open source observability tool. Prior to 2.11.0, Netdata&amp;#39;s unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; netdata&lt;/p&gt;
&lt;p&gt;Netdata is an open source observability tool. Prior to 2.11.0, Netdata&amp;#39;s unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.&lt;/p&gt;</content:encoded>
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