CVE-2025-6638
Regular Expression Denial of Service (ReDoS) in huggingface/transformers
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 12, 2025
- Updated
- Sep 12, 2025
- Reserved
- Jun 25, 2025
Description
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically affecting the MarianTokenizer's `remove_language_code()` method. This vulnerability is present in version 4.52.4 and has been fixed in version 4.53.0. The issue arises from inefficient regex processing, which can be exploited by crafted input strings containing malformed language code patterns, leading to excessive CPU consumption and potential denial of service.
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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