computer-science
New Nginx Exploit
Key takeaways
- RCE Proof of concept for CVE-2026-42945, a critical heap buffer overflow in NGINX's ngx_http_rewrite_module introduced in 2008.
- Try the same system at https://depthfirst.com/open-defense.
- NGINX's script engine uses a two-pass process: first compute the required buffer size, then copy data in.
RCE Proof of concept for CVE-2026-42945, a critical heap buffer overflow in NGINX's ngx_http_rewrite_module introduced in 2008. The bug enables unauthenticated remote code execution against servers using rewrite and set directives.
This vulnerability — along with three other memory corruption issues (CVE-2026-42946, CVE-2026-40701, CVE-2026-42934) — was autonomously discovered by depthfirst's security analysis system after a single click of onboarding the NGINX source.
Want to find issues like this in your own code? Try the same system at https://depthfirst.com/open-defense.
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