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Best practices and tips to secure your infrastructure.

CVE-2026-27654: NGINX DAV + alias Buffer Overflow — Risk Assessment and Practical Hardening Guide

Heap-based buffer overflow in ngx_http_dav_module crashes workers or lets attackers manipulate file paths outside the document root.

Incident-response guide for CVE-2026-27654. Covers affected configuration matrix, detection checklist, immediate mitigations (disable COPY/MOVE, switch alias to root), patch and upgrade path, validation commands, and post-fix monitoring for WebDAV deployments.