SUFE-AILAB

WSADBench: A Unified Benchmark for Weakly Supervised Anomaly Detection

WSADBench is the first benchmark to unify evaluation across the three primary weakly supervised anomaly detection (WSAD) paradigms—incomplete, inexact, and inaccurate supervision—testing 36 algorithms across 4 modalities with over 700K experiments. Key findings challenge the isolation of current WSAD research directions, showing strong correlations between supervision scenarios and that specialized WSAD methods are quickly outperformed by tabular foundation models as label availability increases. The benchmark also reveals inconsistent utility of unlabeled data and asymmetric model sensitivity to label noise types. Code and datasets are released open-source.