CVE-2026-42946

MEDIUM

NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
https://my.f5.com/manage/s/article/K000161027

Scores

CVSS v3 6.5
EPSS 0.0093
EPSS Percentile 56.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-789 CWE-823
Status published
Products (15)
f5/dos 4.8.0
f5/dos 4.3.0 - 4.7.0
F5/NGINX Open Source 0.8.42 - 1.30.1
F5/NGINX Open Source 1.31.0
F5/NGINX Plus R32 - R32 P6
F5/NGINX Plus R36 - R36 P4
F5/NGINX Plus R37
f5/nginx_app_protect_dos 4.3.0 - 4.7.0
f5/nginx_app_protect_waf 4.9.0 - 4.16.0
f5/nginx_gateway_fabric 1.3.0 - 1.6.2
... and 5 more
Published May 13, 2026
Tracked Since May 13, 2026