Lessons from cybersecurity Black Week
The week leading up to October 25, 2026, was every cyber defender’s nightmare: a barrage of critical vulnerabilities in PHP and the Linux kernel, a compromised LiteLLM release, a maximum-severity flaw in GitLab, a Node.js Brotli flaw, and a certificate authority incident affecting TLS trust.
A few years ago, a backlog like this would have filled a defender’s to-do list for a whole month. In the age of AI, all of this was reported within a single “Cybersecurity Black Week,” an exceptionally eventful seven-day period amid an already turbulent Black October. AI-assisted research helped uncover at least two of these flaws: PHP2Shell and the Brotli bug. On top of the breakneck patching pace, security teams faced mounting pressure to deliver status reports to other departments, management, customers, and the media.
Beyond their severity, the issues stood out for the variety of responses they demanded. Some required emergency runtime patches and...
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