CVE-2026-42946CWE-789CWE-823

NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability

High · published May 13, 2026

CVSS v4.0
8.3
EPSS
1%
Percentile
60.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.3 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00932 · 60.3th percentile
Weaknesses
CWE-789 · Memory Allocation with Excessive Size Value; CWE-823 · Use of Out-of-range Pointer Offset
Published
2026-05-13T14:12Z
EPSS history
Timeline
  • 13 MAY 14:12Z
    NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability
    cvelistv5