Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

brace-expansion is a very popular npm package with over 38 billion all-time downloads (yeah, over 38,000,000,000) and used by tooling almost every JavaScript project relies on - eslint, glob, and npm itself. Despite being in the public eye for a while, we found a new Denial-of-Service vulnerability that could affect millions. This post walks through what the package does, existing issues that were fixed, and the new one we found - CVE-2026-13149.

Agent skills are the newest piece of plumbing quietly making its way onto developer machines. They're easy to install, they get to call into the user's tools on the agent's behalf, and once they're in place they tend to stay in place. While auditing the popular installer vercel-labs/skills, we saw several ways a bad actor can make the tool install something other than what the user thought they were installing.