Memory Manipulation Vulnerability in NGINX Open Source by F5 Networks
CVE-2026-27784

8.5HIGH

Key Information:

Vendor

F5
Status
Nginx Open Source
Vendor
CVE Published:
24 March 2026

What is CVE-2026-27784?

A vulnerability exists in the 32-bit version of NGINX Open Source within the ngx_http_mp4_module. This flaw can allow an attacker to manipulate NGINX worker memory, leading to potential over-reads or overwrites. The issue arises when a specially crafted MP4 file is processed under configurations that utilize the mp4 directive. The vulnerability impacts systems built with this specific module, and an attacker must be able to trigger the processing event to exploit the flaw.

Affected Version(s)

NGINX Open Source 1.29.0 < 1.29.7

NGINX Open Source 1.1.19 < 1.28.3

References

https://my.f5.com/manage/s/article/K000160364
vendor-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5 acknowledges Prabhav Srinath (sprabhav7) for bringing this issue to our attention and following the highest standards of coordinated disclosure.
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