NGINX Heap Overflow Flaw Could Let Unauthenticated Attackers Execute Arbitrary Code

A high-severity heap buffer overflow vulnerability has been identified in the NGINX Stream module’s script engine. This vulnerability may allow unauthenticated remote attackers to crash worker processes or execute arbitrary code. The issue CVE-2026-42533 affects configurations that combine the `ssl_preread` feature with regex-driven variables and complex values in stream blocks. NGINX Heap Overflow Flaw The […]

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