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.