CVE intelligence

CVE-2026-42946

Vulnerability intelligence

Published May 13, 2026Sources checked Nov 14, 2026

7.4HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-42946 and is rated High severity with a CVSS score of 7.4. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: May 17, 2026

CBL-Mariner Releases

Vendor-listed releases

1.28.3-2

CISA KEVNot listedBased on the latest collected catalog

EPSS0.9%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-42946?

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.

Source: NVD