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Computer Scientist Pushes a 1996 Algorithm Beyond Its Longstanding Limit

A new algorithm solves a blind spot that has challenged computer scientists since 1996, improving distance estimates for nearby points in massive networks.

Navigation apps usually solve one route at a time, such as finding the fastest way from a hotel to an airport. Computer scientists face a far larger version of that challenge: calculating the shortest distance between every possible pair of locations in a network.

Known as the All-Pairs Shortest Paths (APSP) problem, this task applies to far more than road maps. A graph can represent computers connected by data links, stations joined by rail lines, proteins interacting inside a cell, or neurons communicating in the brain. The points are called vertices, and the connections between them are edges.

Google Gemini Broke Into Real Company Systems After Security Test Domain Mix-Up

Google’s Gemini model has become the latest artificial intelligence (AI) system to access the internet and break into other companies during a cybersecurity evaluation. The development was first reported by The Wall Street Journal.

The incidents occurred in May 2026 as part of a test run conducted by Israeli company Irregular. The evaluation partner was also involved in similar hacks disclosed by OpenAI, Anthropic, and Meta.

According to the Journal, the model gained access to a protected system after repeatedly guessing its password. Two other cases related to the model finding credentials in a public repository, allowing it to obtain unauthorized access to protected systems.

Fake LastPass Authenticator GitHub repos push new Rapuncel infostealer

An ongoing malware campaign uses SEO-optimized GitHub repositories to impersonate well-known software firms to push a previously undocumented information stealer called Rapuncel.

LastPass and Delphos Labs uncovered the campaign, which they report impersonates the password manager brand and at least 39 other companies.

Alongside the Rapuncel infostealer, the repositories deliver a Microsoft-signed kernel driver that can disable 145 antivirus and endpoint detection and response (EDR) products.

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Microsoft Teams will let admins block custom file extensions

Microsoft Teams will soon let administrators tweak the list of file extensions commonly associated with malware and security threats to meet their company’s security requirements.

This will come as an update to Weaponizable File Protection, a built-in Teams messaging safety feature that scans conversations and blocks chat or channel messages with dangerous, high-risk file attachments.

As detailed in a new Microsoft 365 roadmap entry, the feature is currently in development and will start rolling out in November 2026.

New thermal insulator outperforms any material found in nature

Researchers have engineered a new material that is an extreme thermal insulator, is exceptionally stiff and can be printed as a thin film at large scales. The material has one of the lowest thermal conductivity profiles of any dense, or nonporous, material—approaching the theoretical limit of how good a material can be as a thermal insulator.

“Stiff materials that are good thermal insulators would have substantial utility in a variety of applications, from cookware to electronic devices to space travel,” says Dali Sun, co-corresponding author of a journal article on the work and a professor of physics at North Carolina State University.

“But this is a significant challenge,” Sun says. “Because, in general, stiff materials are good at conducting heat, and materials that are not stiff are good at insulating against heat. We’ve created a material that is very stiff and is extremely good at insulating against heat. Better than any material you would find in nature.”

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