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Node2Shell: Node.js Brotli Remote Code Execution Vulnerability

A high-severity out-of-bounds write vulnerability in the Node.js Brotli decoder (Node2Shell) allows remote code execution when processing malformed compressed data.

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Tim Peck@timpeck11 days ago

2 intel reports

Focused assessment of Cisco advisory cisco-sa-ise-rce-se7bYU57 covering only CVE-2026-20307, CVE-2026-20176 and CVE-2026-20211. Includes per-CVE remediation, advisory-linked Talos signatures and three experimental KQL templates with explicit telemetry and validation limits. Assessed 20 September 2026.