Critical NGINX Vulnerability Can Crash Workers and May Allow Remote Code Execution

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Critical NGINX Vulnerability Can Crash Workers and May Allow Remote Code Execution

July 19, 2026 dirk 0 Comments 3 tags

Critical NGINX Vulnerability Can Crash Workers and May Allow Remote Code Execution

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 on July 15 in nginx 1.30.4 (stable) and 1.31.3 (mainline), and in NGINX Plus 37.0.3.1; anyone on an earlier build should upgrade.

Triggering it can crash or restart the worker, causing a denial of

Source: The Hacker News

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