CVE-2026-32647: NGINX ngx_http_mp4_module vulnerability

NGINX Open Source and NGINX Plus have a vulnerability in the ngxhttpmp4module module, which might allow an attacker to trigger a buffer over-read or over-write to the NGINX worker memory resulting in its termination or possibly code execution, using a specially crafted MP4 file. This issue affects NGINX Open Source and NGINX Plus if it is built with the ngxhttpmp4module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngxhttpmp4module module.

— F5

Out-of-Bounds Read/Write vulnerability in the ngxhttpmp4module of NGINX Open Source and NGINX Plus. The flaw is caused by improper handling of specially crafted MP4 files during processing. When such a file is parsed, it can trigger a buffer over-read or overwrite in worker memory, leading to process termination or undefined behavior. This vulnerability can be exploited by a local authenticated attacker capable of supplying a malicious MP4 file, potentially causing denial-of-service or achieving code execution under certain conditions.

— Red Hat