CVE-2026-32647
HighCVSS 7.8Exploitation Probability (EPSS)
Elevated risk56th percentile - higher than 56% of all known CVEs
Summary
A vulnerability in the ngx_http_mp4_module module of NGINX allows an attacker to trigger a buffer over-read or over-write in NGINX worker memory using a specially crafted MP4 file, potentially causing process termination or code execution.
Risk Assessment
An attacker can remotely crash the NGINX server or gain code execution, leading to service disruption or compromise of data confidentiality and integrity.
Recommendation
Immediately update NGINX to a patched version. If not possible, disable the ngx_http_mp4_module module or remove the mp4 directive from the configuration.
Other vulnerabilities in NGINX
See all- CVE-2016-1247High
The nginx package before 1.6.2-5+deb8u3 on Debian jessie and earlier versions on Ubuntu and Gentoo allow local users with access to the web server user account to gain root privileges via a symlink attack on the error log.
- CVE-2016-4450High
In nginx before 1.10.1 and 1.11.x before 1.11.1, a vulnerability allows remote attackers to cause a denial of service (NULL pointer dereference and worker process crash) via a crafted request, involving writing a client request body to a temporary file.
- CVE-2016-0742High
The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service via an invalid pointer dereference, leading to a worker process crash.
- CVE-2014-0133High
Heap-based buffer overflow in the SPDY implementation in nginx 1.3.15 before 1.4.7 and 1.5.x before 1.5.12 allows remote attackers to execute arbitrary code via a crafted request.
- CVE-2026-9256High
A vulnerability in the ngx_http_rewrite_module of NGINX Plus and NGINX Open Source occurs when a rewrite directive uses a regex pattern with overlapping PCRE captures and a replacement string referencing multiple captures. An unauthenticated attacker can send crafted HTTP requests, causing a heap buffer overflow in the NGINX worker process, leading to a restart.
- CVE-2026-42945High
A vulnerability exists in NGINX Plus and NGINX Open Source within the ngx_http_rewrite_module. It occurs when the rewrite directive is followed by rewrite, if, or set directives and an unnamed PCRE capture (e.g., $1, $2) with a replacement string containing a question mark (?). An unauthenticated attacker can send crafted HTTP requests, causing a heap buffer overflow in the NGINX worker process, leading to a restart.
- CVE-2026-27654High
A vulnerability in the NGINX ngx_http_dav_module allows an attacker to trigger a buffer overflow in the NGINX worker process. The issue occurs when the configuration uses MOVE or COPY methods with alias directives and prefix locations.
- CVE-2016-0746Critical
A use-after-free vulnerability in the resolver in nginx versions 0.6.18 through 1.8.0 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service (worker process crash) or possibly have unspecified other impact via a crafted DNS response related to CNAME response processing.
- CVE-2026-60005High
A vulnerability exists in NGINX Plus and NGINX Open Source within the ngx_http_slice_module module. When the slice directive with unnamed regex captures is configured or during a background cache update, unauthenticated attackers can send requests causing uninitialized memory access in the NGINX worker process, leading to limited memory disclosure or a restart.
- CVE-2026-56434Medium
A vulnerability exists in NGINX Plus and NGINX Open Source within the ngx_http_ssi_module module. This issue occurs when Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. An unauthenticated attacker with man-in-the-middle (MITM) capability to control upstream server responses may trigger a use-after-free in the NGINX worker process.
Original NVD description (English source)
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.