TWiT Newsletter December 15, 2025

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One Request, a Million Servers at Risk
Hosted by Steve Gibson & Leo Laporte
A nightmare scenario for the modern web: a new React vulnerability scored a perfect 10 for severity, allowing remote code execution on more than a million servers with a single HTTP request. Steve and Leo walk through how the flaw worked, how quickly attackers jumped in, and why this bug sent shockwaves through web security circles. If you build, run, or secure anything online, this episode is essential listening.
Download here | Watch on YouTube
Is AI Secretly Raising Your Grocery Bill?
Hosted by Mikah Sargent & Amanda Silberling
Guest: Derek Kravitz
Are you paying more for groceries than your neighbor? Mikah Sargent talks with Derek Kravitz about how Instacart may be using AI to quietly charge different prices for the same items. The episode looks at algorithmic pricing, consumer fairness, and how personalization can cross into something far more uncomfortable. Food for thought—literally.
Download here | Watch on YouTube

Holiday Special + Best Of Episodes Ahead
We’re taking a break for the holidays, but the feed will remain active. Be sure to mark your calendar for TWiT's Best of 2025 episodes and our Holiday Special. This weekend, Leo and Mikah will record the Holiday Special, and the Best Of run kicks off with This Week in Tech on Sunday, 12/28.
Full schedule at TWiT.tv/schedule
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