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transformers 5.9.0: known vulnerabilities

The comparison for transformers 5.9.0 is incomplete. Review the confirmed matches below.

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Vulnerabilities: 1

  1. CVE-2026-9856

    High · CVSS 7.1EPSS 0.46%Fix available

    Path Traversal in huggingface/transformers

    A vulnerability in huggingface/transformers versions <=5.8.0.dev0 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, enabling arbitrary file writes with attacker

    • Update to 5.10.0
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