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CVE-2026-68770 is a security control bypass vulnerability in Hugging Face's sentence-transformers package affecting versions up to and including 5.5.1. The flaw is in the import_module_class helper in sentence_transformers/util/misc.py. A logic error in the trust gate includes a condition equivalent to accepting any model path that exists on the local filesystem, which causes the protection expected from trust_remote_code=False to be bypassed for local model directories. If an attacker can control or influence the contents of a model directory on disk, they can place malicious Python modules, including modeling-related files referenced through modules.json. When an application loads the model with SentenceTransformer(path, trust_remote_code=False), those attacker-supplied modules are imported and executed during the loading process. The issue therefore breaks the documented security boundary associated with disabling remote code trust and can lead to arbitrary code execution.
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