Active exploitation of NGINX Rift vulnerability (CVE-2026-42945)

Source:The Register

02 — Who / Subject

VulnCheck, NGINX

03 — Where / Locus

Global

04 — When / Temporality

May 18, 2026

Verified: May 18, 2026

05 — Why / Core Summary

"Researchers at VulnCheck report active exploitation of CVE-2026-42945, a heap buffer overflow in NGINX. The flaw, nicknamed 'NGINX Rift', has existed for 18 years and affects NGINX Open Source and Plus. While RCE is difficult due to modern Linux protections, millions of servers remain potentially vulnerable."

Conflict Analysis

A critical security vulnerability affecting a major web server component, with confirmed active exploitation.

Recommended Background Resource

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The Art of Memory Forensics: Detecting Malware and Threats in Windows, Linux, and Memory Dump Analysis

Author: Michael Hale Ligh, Andrew Case, Jamie Levy, AAron Walters

This book provides a deep dive into memory forensics and the mechanics of buffer overflows, which is essential for understanding how vulnerabilities like NGINX Rift exploit heap memory and why modern Linux protections are critical in mitigating RCE.

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