The huggingface/transformers library, versions prior to 4.53.0, is vulnerable to Regular Expression Denial of Service (ReDoS) in the AdamWeightDecay optimizer. The vulnerability arises from the _do_use_weight_decay method, which processes user-controlled regular expressions in the include_in_weight_decay and exclude_from_weight_decay lists. Malicious regular expressions can cause catastrophic backtracking during the re.search call, leading to 100% CPU utilization and a denial of service. This issue can be exploited by attackers who can control the patterns in these lists, potentially causing the machine learning task to hang and rendering services unresponsive.
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Thu, 25 Sep 2025 08:30:00 +0000
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Huggingface
Huggingface transformers |
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Huggingface
Huggingface transformers |
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cvssV3_1
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Tue, 23 Sep 2025 15:15:00 +0000
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ssvc
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Tue, 23 Sep 2025 14:00:00 +0000
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Description | The huggingface/transformers library, versions prior to 4.53.0, is vulnerable to Regular Expression Denial of Service (ReDoS) in the AdamWeightDecay optimizer. The vulnerability arises from the _do_use_weight_decay method, which processes user-controlled regular expressions in the include_in_weight_decay and exclude_from_weight_decay lists. Malicious regular expressions can cause catastrophic backtracking during the re.search call, leading to 100% CPU utilization and a denial of service. This issue can be exploited by attackers who can control the patterns in these lists, potentially causing the machine learning task to hang and rendering services unresponsive. | |
Title | Regular Expression Denial of Service (ReDoS) in huggingface/transformers | |
Weaknesses | CWE-400 | |
References |
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Metrics |
cvssV3_0
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Status: PUBLISHED
Assigner: @huntr_ai
Published: 2025-09-23T13:56:15.636Z
Updated: 2025-09-23T14:56:29.038Z
Reserved: 2025-06-30T09:44:12.092Z
Link: CVE-2025-6921

Updated: 2025-09-23T14:56:25.327Z

Status : Awaiting Analysis
Published: 2025-09-23T14:15:41.387
Modified: 2025-09-24T18:11:24.520
Link: CVE-2025-6921
