CVE-2026-42946 MEDIUM

CVE-2026-42946: NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability

Vendor F5
Product NGINX Plus
Weakness CWE-789
Published May 13, 2026
Last update May 13, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

What the vulnerability does

Description

A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Key dates

Disclosure timeline

May 13, 2026 CVE published
May 13, 2026 Record updated