Therefore, describing the impact as "DoS – Potential RCE" is more accurate than implying that RCE is guaranteed.
If your environment relies on NGINX or NGINX-based products:
Review rewrite configurations.
Apply the latest security updates
Monitor logs for indicators of compromise
🚨 NGINX Vulnerability – CVE-2026-42945
A critical vulnerability in ngx_http_rewrite_module remained undiscovered since 2008 and has been assigned a CVSS v4 score of 9.2.
The vulnerability can lead to Denial of Service (DoS) and, under specific conditions, Potential (RCE).