CVE-2025-5197 Information

Description

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Hugging Face Transformers library specifically in the convert_tf_weight_name_to_pt_weight_name() function. This function responsible for converting TensorFlow weight names to PyTorch format uses a regex pattern /[^/]___([^/])/ that can be exploited to cause excessive CPU consumption through crafted input strings due to catastrophic backtracking. The vulnerability affects versions up to 4.51.3 and is fixed in version 4.53.0. This issue can lead to service disruption resource exhaustion and potential API service vulnerabilities impacting model conversion processes between TensorFlow and PyTorch formats.

Reference

https://github.com/huggingface/transformers/commit/944b56000be5e9b61af8301aa340838770ad8a0b https://huntr.com/bounties/3f8b3fd0-166b-46e7-b60f-60dd9d2678bf https://huntr.com/bounties/3f8b3fd0-166b-46e7-b60f-60dd9d2678bf