CVE-2026-32647 NGINX ngx_http_mp4_module vulnerability
Attacker can cause memory corruption and potential code execution or service termination via crafted MP4 files in NGINX with mp4 module enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32647?
CVE-2026-32647 is a high-severity memory corruption vulnerability in F5 NGINX Open Source, published on 24 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_mp4_module 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 ngx_http_mp4_module 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 ngx_http_mp4_module module.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Weakness: CWE-125
Which versions are affected by CVE-2026-32647?
2 open source packages ship an affected version, including nginx and nginx-gateway. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
nginx Bitnami | From 1.1.19 | 1.28.3, 1.29.7 |
nginx-gateway Bitnami | From 1.1.19 | 1.28.3, 1.29.7 |
Products include F5 Nginx Open Source, F5 Nginx Plus.
How do I fix CVE-2026-32647?
Upgrade nginx to a fixed version for your release line: 1.28.3 or 1.29.7.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-32647 being exploited?
There is no known exploitation of CVE-2026-32647 in the wild and no public exploit code.
Other vulnerabilities in F5 NGINX Open Source
Sources
Also known as ALPINE-CVE-2026-32647, AZL-80786, BELL-CVE-2026-32647, BIT-nginx-2026-32647, BIT-nginx-gateway-2026-32647, CLSA-2026-1790928783 and 14 more.