Blockchain Security | Breaking Cybersecurity News | The Hacker News

Researchers at KU Leuven tested 85 of the most popular crypto wallets that run as browser extensions and found that the wallets themselves leak enough to link and track the people using them. The way these wallets talk to websites and blockchain servers can tie a person's separate addresses together and let outsiders follow them from site to site. And on a site that already holds a name or email, the same leaks can put a real name to an "anonymous" crypto identity. This is not a hack. The wallets behave exactly as they were built to. The 85 extensions together have about 35 million users listed on the Chrome Web Store. The team, from the university's DistriNet security group,  posted the paper  this month and will present it at the PETS 2026 privacy conference in Calgary in late July. They ran real wallets against real Web3 sites and mapped out five privacy weaknesses in how wallets and websites interact. When they reported the most far-reaching one to the wa...

Cybersecurity researchers have flagged a new malicious extension in the Open VSX registry that harbors a remote access trojan called SleepyDuck . According to Secure Annex's John Tuckner, the extension in question, juan-bianco.solidity-vlang (version 0.0.7), was first published on October 31, 2025, as a completely benign library that was subsequently updated to version 0.0.8 on November 1 to include new malicious capabilities after reaching 14,000 downloads. "The malware includes sandbox evasion techniques and utilizes an Ethereum contract to update its command and control address in case the original address is taken down," Tuckner added . Campaigns distributing rogue extensions targeting Solidity developers have been repeatedly detected across both the Visual Studio Extension Marketplace and Open VSX. In July 2025, Kaspersky disclosed that a Russian developer lost $500,000 in cryptocurrency assets after installing one such extension through Cursor. In the latest...

Cybersecurity researchers have discovered a new malicious package on the Python Package Index (PyPI) repository that masquerades as a library from the Solana blockchain platform but is actually designed to steal victims' secrets. "The legitimate Solana Python API project is known as 'solana-py' on GitHub, but simply ' solana ' on the Python software registry, PyPI," Sonatype researcher Ax Sharma said in a report published last week. "This slight naming discrepancy has been leveraged by a threat actor who published a 'solana-py' project on PyPI." The malicious "solana-py" package attracted a total of 1,122 downloads since it was published on August 4, 2024. It's no longer available for download from PyPI. The most striking aspect of the library is that it carried the version numbers 0.34.3, 0.34.4, and 0.34.5. The latest version of the legitimate "solana" package is 0.34.3. This clearly indicates an attempt o...