PT-2026-27431 · F5 · Nginx Open Source

Published 2026-03-24 · Updated 2026-03-24 · CVE-2026-27784

NVD

CVSS v3.1

7.8

High

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-27784

Affected Products

Nginx Open Source

References · 2

• https://my.f5.com/manage/s/article/K000160364 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27784 · Security Note