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CVE-2026-68770 is a critical security control bypass vulnerability in Hugging Face sentence-transformers affecting versions up to and including 5.5.1. The flaw is in the import_module_class helper in sentence_transformers/util/misc.py, where a logic condition incorrectly treats the existence of a local filesystem path as sufficient to satisfy the trust gate because it includes an os.path.exists(model_name_or_path) branch. As a result, applications that load a model from a local directory with trust_remote_code set to false can still import attacker-controlled Python modules referenced through modules.json. If an attacker can control or influence the contents of the model directory, malicious modeling modules can execute during import, defeating the documented security expectation of trust_remote_code=false and resulting in arbitrary code execution during the model-loading process.
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A security control bypass in Hugging Face sentence-transformers that can lead to arbitrary code execution when loading a local model, despite trust_remote_code=False.
A critical security control bypass vulnerability in Hugging Face's sentence-transformers library that can lead to arbitrary code execution by bypassing trust_remote_code=False when loading models from a local path.
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