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Security news roundup Oct 20, 2026
• WhatsApp hid instructions in help pages telling its AI chatbot not to recommend privacy regulators • Go issues emergency update blocking eight CA keys over undisclosed security concerns • Hackers hijack five OVVcloud CLI releases to distribute secret‑stealing malware • Quantum and AI threaten cryptographic hard‑math problems • Plex2Shell flaws exploited to install crypto miners and Linux proxy backdoor • Rank Math PRO WordPress SEO plugin hijacked to deliver self‑restoring backdoor