Wiz says a stolen-token campaign planted secret-dumping workflows across 850-plus GitHub accounts
AspireAI community · Wiz Research
Wiz Research says it has recovered more than 13,500 malicious branches from over 850 compromised GitHub accounts in a campaign it calls Gheist. The attack plants a GitHub Actions workflow that prints repository secrets into its own log, then downloads and deletes the run, so nothing has to leave through an attacker-controlled domain. GitHub's approval hold blocked the payloads in public repositories, but Wiz observed successful exploitation in private repositories and GitHub Enterprise environments, and says the campaign was still evolving as of October 24. Wiz's remediation guidance is blunt: rotate every secret reachable by an affected repository, revoke the pushing tokens, and treat any self-hosted runner touched by the campaign as compromised.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.