CVE-2025-6051
Regular Expression Denial of Service (ReDoS) in huggingface/transformers
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 14, 2025
- Updated
- Sep 15, 2025
- Reserved
- Jun 13, 2025
Description
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the `normalize_numbers()` method of the `EnglishNormalizer` class. This vulnerability affects versions up to 4.52.4 and is fixed in version 4.53.0. The issue arises from the method's handling of numeric strings, which can be exploited using crafted input strings containing long sequences of digits, leading to excessive CPU consumption. This vulnerability impacts text-to-speech and number normalization tasks, potentially causing service disruption, resource exhaustion, and API vulnerabilities.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.0 | 5.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | @huntr_ai |
Weaknesses
- CWE-1333 Inefficient Regular Expression Complexity
Affected Products
| Product | Versions |
|---|---|
huggingface/transformershuggingface |
|
References
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