[10/21 18:00] AI-discovered PHP flaws push governments to take websites offline / Legora raises $550 million at an $8.8 billion valuation

AI News Flash for October 21, 2026 at 18:00 UTC.

Topics: 1. AI-discovered PHP flaws push governments to take websites offline https://www.reuters.com/world/asia-pacific/eu-agency-warns-websites-may-need-be-taken-offline-php-prepares-patches-2026-10-21/ 2. Legora raises $550 million at an $8.8 billion valuation https://qz.com/legora-series-e-550-million-valuation-legal-ai-102126 3. Microsoft researcher uses human-directed AI to prove the 31-year-old KLS conjecture https://www.microsoft.com/en-us/research/blog/solving-a-31-year-old-grand-challenge-in-mathematics-the-kls-conjecture/ 4. OpenAI uses thousands of agents to analyze a mouse brain gene atlas in 32 minutes https://openai.com/index/scaling-ai-research-for-complex-biological-data/ 5. Anthropic names Harvard astrophysicist Chris Stubbs to its Long-Term Benefit Trust https://fortune.com/2026/10/21/anthropic-adds-harvard-astrophysicist-to-the-trust-that-controls-its-board/