(Author of this post.)

If you’re interested in how this went down, the timeline section[1] in particular is worth jumping to: my key takeaway is that this vulnerability was reintroduced, and that there’s only limited evidence that the Ultralytics team have done a full revocation and rotation of all accounts and credentials that the attacker may have had access to.

Given that, it’s not inconceivable that a third round of backdoored packages will occur. I would recommend that people exercise extreme caution when installing the current versions; most users would probably be best served by pinning to an older version from before any indicators of compromise.

[1]: https://blog.yossarian.net/2024/12/06/zizmor-ultralytics-inj...