Microsoft subsidiary GitHub will warn programmers about vulnerable dependencies at every pull request, the source code sharing hub announced at its GitHub Universe conference Tuesday.

Modern software is typically a patchwork of third-party and newly written code. That third-party code is often dependent on even more third-party code. It can take a while for every link in a chain to even notice a problem, let alone repair it.

GitHub's new offering merges the existing dependency graph and notifications about vulnerabilities within dependencies into an advance warning that a problem may already exist.

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