CVE-2026-68770

sentence-transformers contains a security control bypass vulnerability that allows attackers to achieve arbitrary code execution by exploiting a logic flaw in the importmoduleclass helper within sentencetransformers/util/misc.py, where the guard condition includes an 'or os.path.exists(modelnameorpath)' clause that satisfies the trust gate whenever the supplied path exists on the local filesystem, regardless of the trustremotecode=False argument. Attackers who can control or influence the contents of a model directory on disk can place malicious Python files such as modeling_*.py referenced via modules.json, causing the code to execute at import time when an application loads the model with SentenceTransformer(path, trustremotecode=False), bypassing the documented security contract and achieving code execution within the loading process.