SOURCE-LINKED INTELLIGENCE
GHSA-xrqw-3rrv-vx5w: Transformers save_pretrained path traversal allows arbitrary file writes through chat template names
A vulnerability in huggingface/transformers versions < 5.10.0 allows an attacker to perform arbitrary file writes via path traversal. The issue resides in the `save_pretrained()` methods of `PreTrainedTokenizerBase` and `ProcessorMixin`, where keys from the `chat_template` dictionary are used directly as filenames without proper validation. An attacker can exploit this by publishing a malicious Hugging Face Hub repository with a crafted `tokenizer_config.json` file. When a victim downloads and saves the tokenizer or processor, the attacker-controlled keys can escape the intended save directory
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- recordType
- vulnerability
- status
- active
- evidenceStatus
- reported
- region
- Global
Evidence & attribution
- OSV AI package advisories · 2026-08-02T18:30:20.000Z
- OSV AI package advisories · 2026-09-10T09:44:51.053Z
First collected: 2026-09-19T20:26:46.936Z. This is not the publication date.