Unsloth Zoo Code Injection via model_type in config.json
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| unslothai | unsloth-zoo | unaffected |
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| unslothai | unsloth | unaffected |
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No data.
| Vendor | Product | Versions | ||||||||
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| Unslothai | Unsloth |
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| Unslothai | Unsloth-zoo |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.409% probability within 30 days)
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ssvc
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threat_severity
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threat_severity
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| First Time appeared |
Unslothai
Unslothai unsloth Unslothai unsloth-zoo |
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Unslothai
Unslothai unsloth Unslothai unsloth-zoo |
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| Description | 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. | |
| Title | Unsloth Zoo Code Injection via model_type in config.json | |
| Weaknesses | CWE-94 | |
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| Metrics |
cvssV3_1
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