Bug 2477132 (CVE-2026-42946)

Summary: CVE-2026-42946 nginx: ngx_http_scgi_module: ngx_http_uwsgi_module: information disclosure and denial of service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: caswilli, kaycoth, rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the ngx_http_scgi_module and ngx_http_uwsgi_module modules of NGINX. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker able to intercept and modify network traffic via a Man-In-The-Middle (MITM) attack and control the responses from an upstream server may be able to read sensitive data from the worker process or cause a denial of service by forcing the process to restart.
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Description OSIDB Bzimport 2026-05-13 16:05:45 UTC 
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.