Latest cybersecurity reporting from selected sources.

Microsoft-Owned GitHub, Which Runs npm, Previews Supply-Chain Security FixesThe popular Mastra AI framework, used to build artificial intelligence agents, workflows and retrieval-augmented generation pipelines, has been poisoned by attackers, and Microsoft-owned GitHub has advised all developers to downgrade Mastra, pending compromised packages being found and eradicated.

The Miasma worm compromised 73 Microsoft GitHub repos, spreading via AI coding tools and stealing cloud credentials from developers and CI/CD systems. A self-replicating worm called Miasma has compromised 73 Microsoft GitHub repositories and forced GitHub staff to disable them. The affected repos include core Azure infrastructure like azure-functions-host and the entire Durable Task family […]

Microsoft Threat Intelligence identified a prompt injection pathway in Claude Code GitHub Action that allowed access to workflow secrets under specific conditions. This research examines the attack chain, responsible disclosure process, Anthropic's mitigation, and guidance for securing AI-powered CI/CD workflows. The post Securing CI/CD in an agentic world: Claude Code Github action case appeared first on Microsoft Security Blog.

Researchers who found the flaws scored beer money bounties and warn the problem is probably pervasive Exclusive Security researchers hijacked three popular AI agents that integrate with GitHub Actions by using a new type of prompt injection attack to steal API keys and access tokens, and the vendors who run agents didn’t disclose the problem.…

Fake OpenClaw installers hosted in GitHub repositories and promoted by Microsoft Bing's AI-enhanced search feature instructed users to run commands that deployed information stealers and proxy malware. [...]

Think before you download OpenClaw, the AI agent that can manage just about anything, is risky all by itself, but now fake installers for it are wreaking havoc. Users who searched Bing’s AI results for “OpenClaw Windows” were directed to a malicious GitHub repository that delivered information stealers and GhostSocks onto their machines.…

A vulnerability in GitHub Codespaces could have been exploited by bad actors to seize control of repositories by injecting malicious Copilot instructions in a GitHub issue

CEO Satya Nadella Highlights DeepSeek-R1 Model, AI Cost Reductions, Future GrowthMicrosoft CEO Satya Nadella said AI scaling laws, compounded by Moore’s Law, are accelerating efficiency gains, with a 10x improvement per model generation. He revealed Microsoft’s strategy for optimizing AI costs and highlights DeepSeek-R1’s availability on Azure AI Foundry and GitHub.

Microsoft on Monday said it took steps to correct a glaring security gaffe that led to the exposure of 38 terabytes of private data

Included secrets, private keys, passwords, 30,000+ internal Teams messages A Microsoft employee accidentally exposed 38 terabytes of private data while publishing a bucket of open-source AI training data on GitHub, according to Wiz security researchers who spotted the leaky account and reported it to the Windows giant.…

The Microsoft AI research division accidentally leaked dozens of terabytes of sensitive data while contributing open-source AI learning models to a public GitHub repository. [...]