Trust me, as someone who has contributed to such a package set, almost nobody is inspecting diffs between upstream versions when updating a package. Only the package definitions themselves are reviewed, but they are typically only version + hash bumps.
replyReviewing upstream diffs for every package requires a lot of man hours and most packagers are volunteers. I guess LLMs might help catching some obvious cases.
Not really talking about upstream. Most supply attacks I’ve heard about are stolen secrets and artifacts uploading. They’re not about repositories or websites being taken over. As the packaging scripts are often in repos, you detect easily if people are trying to update where upstream points to.
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