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#5 SecurityWeek general October 26, 2026 at 10:21 UTC

Node2Shell: Brotli Flaw Triggers Patching Across Microsoft, Node.js, Python Packages

By Eduard Kovacs

AI Summary

Google's Brotli decoder contains an out-of-bounds write vulnerability (dubbed Node2Shell/HTTP2Shell) that affects Node.js, Microsoft .NET, PowerShell, and Python packages, enabling remote code execution. Microsoft issued emergency .NET patches and PHP rebuilt Windows packages for versions 8.2–8.5 (CVE-2026-111497) within days, while Siemens, Schneider Electric, and ABB confirmed impact on industrial products.

Relevance score: 74.0/100

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