CVE-2026-93348
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
Unsloth Zoo versions 2025.9.9 before 2026.8.14, as implemented in Unsloth 2025.9.9 through 2026.8.19, contains a code injection vulnerability in the model-loading compile path. The get_transformers_model_type() function in hf_utils.py collects model_type values from nested model configurations without enforcing a character allowlist, allowing newlines and arbitrary Python source to survive normalization. Attackers can embed a newline in a nested model_type value within a malicious model's config.json to terminate the generated import statement and execute arbitrary Python code via exec() in unsloth_compile_transformers(), achieving remote code execution as the loading user.
Risk Assessment
A remote attacker can execute arbitrary code on the user's machine when loading a malicious model, potentially leading to system compromise, data theft, or further attacks.
Recommendation
Update Unsloth Zoo to version 2026.8.14 or later. Avoid loading models from untrusted sources and consider using a sandbox for model processing.
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Original NVD description (English source)
Unsloth Zoo versions 2025.9.9 before 2026.8.14, as implemented in Unsloth 2025.9.9 through 2026.8.19, contains a code injection vulnerability in the model-loading compile path where the get_transformers_model_type() function in hf_utils.py collects model_type values from nested model configurations without enforcing a character allowlist, allowing newlines and arbitrary Python source to survive normalization. Attackers can embed a newline in a nested model_type value within a malicious model's config.json to terminate the generated import statement and execute arbitrary Python code via exec() in unsloth_compile_transformers(), achieving remote code execution as the loading user when the model is loaded for training or inference.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS