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Critical NGINX Vulnerability Can Crash Workers and May Allow Remote Code Execution - The Hacker News

Reported by The Hacker News | July 19, 2026, 8:42 pm

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F5 patches CVE-2026-42533, a regex map heap overflow that crashes nginx workers and may allow RCE in specific configurations.

F5 has shipped fixes for a critical nginx flaw that lets a remote, unauthenticated attacker trigger a heap buffer overflow in the worker process with crafted HTTP requests. CVE-2026-42533 was patched…

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