NGINX
CVE-2026-42946: NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| NGINX Plus R37 | Not affected |
| NGINX Plus R36 | R36 P4 or later |
| NGINX Plus R32 | R32 P6 or later |
| NGINX Open Source 1.31 | Not affected |
| NGINX Open Source 0.8 | 1.30.1 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.