CVE-2026-42533: Critical nginx Heap Overflow — Patch Now

F5 patched CVE-2026-42533 on July 15. If you run nginx, this one deserves your attention before the proof-of-concept code drops — and there is a countdown on that. What the flaw is The vulnerability is a heap buffer overflow (CWE-122) in nginx&rsquo;s script engine — the component that assembles output strings from configuration directives at request time. It surfaces under a specific…