CVE-2026-27784CWE-190

NGINX ngx_http_mp4_module vulnerability

High · published March 24, 2026

CVSS v4.0
8.5
EPSS
1%
Percentile
64.6
In the wild
Unconfirmed
What it is

The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source 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.

The record
Technical detail
CVSS v4.0
8.5 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.01071 · 64.6th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-03-24T14:13Z
EPSS history
Timeline
  • 24 MAR 14:13Z
    NGINX ngx_http_mp4_module vulnerability
    cvelistv5