CVE-2026-93348: Unslothai Unsloth

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Unslothai Unsloth: from 2025.9.9, before 2026.8.20 (fixed in 2026.8.20)
• Unslothai Unsloth-Zoo: from 2025.9.9, before 2026.8.14 (fixed in 2026.8.14)

Published 2026-09-28. Last modified 2026-09-30.