In late March 2026open on a new tab, Anthropic inadvertently released the internal Claude Code source material as part of an npm package that included a large internal source map file. Although the incident stemmed from a simple packaging mistake, threat actors were quick to capitalize on the resulting attention. Only 24 hours after the leak, they were able to create fake GitHub repositories to distribute credential-stealing malware disguised as “leaked” Claude Code downloads.
This incident demonstrates that security compromise is not limited to software vulnerabilities: human factors and organizational control gaps often serve as catalyst for threats and are primary drivers of material impact. In this blog entry, we will talk about our analysis of the threats capitalizing on this incident, the downstream risks of the leaked source code, and the actions organizations should take next.
Read more…
Source: Trend Micro
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- North Korean hackers blamed for $290M crypto theft
April 20, 2026
Over the weekend, hackers stole more than $290 million in cryptocurrency from Kelp DAO, a protocol that allows users to earn yields on idle crypto investments. By Monday, LayerZero, one of the projects affected by the hack, accused North Korea of carrying out the heist. The hack is now the largest crypto theft of the year ...
- Mythos: An AI tool too powerful for public release
April 20, 2026
Anthropic’s most capable model to date, Claude Mythos Preview (aka Mythos), has been described as a “step change” in AI performance, especially on cybersecurity tasks. Anthropic tried to keep Mythos a secret until a few weeks ago, when a data leak revealed the existence of what the company said was its most powerful artificial intelligence to ...
- Hackers are abusing Apple account notifications to distribute malware, steal money and data
April 20, 2026
Scammers have found a way to abuse Apple’s email notification system to deliver phishing messages and trick people into giving away sensitive data and system access. Recently, people started receiving emails from the email.apple.com domain, notifying them of a $899 iPhone purchase via PayPal. The email also shared a phone number for the victims to call, ...
- NIST changes enrichment process for National Vulnerability Database due to surge in CVE submissions
April 20, 2026
The number of reported vulnerabilities has surged so sharply that it forced the National Institute of Standards and Technology (NIST) to change how it ‘enriches’ each entry. Until now, NIST would take a basic CVE record and add structured analysis, to make it more useful in the National Vulnerability Database (NVD). That usually includes severity scoring ...
- UK: Military reviews Army’s use of Chinese technology to make weapons
April 18, 2026
The Defence Secretary has ordered an investigation after The Telegraph revealed that the British Army was using Chinese 3D printers to build weapons. Last year, it was revealed that British troops were taking the technology with them into the field and using it to make “suicide drones” for attack missions, despite national security concerns. Army officers said ...
- Tracking Mirai Variant Nexcorium: A Vulnerability-Driven IoT Botnet Campaign
April 17, 2026
IoT devices are increasingly prime targets for large-scale attacks due to their widespread use, lack of patching, and often weak security settings. Threat actors continue exploiting known vulnerabilities to gain initial access and deploy malware that can persist, spread, and cause distributed denial-of-service (DDoS) attacks. FortiGuard Labs has analyzed a recent campaign exploiting CVE-2024-3721 in TBK ...