Vulnerability Database
296,278
Total vulnerabilities in the database
CVE-2025-2099
A vulnerability in the preprocess_string() function of the transformers.testing_utils module in huggingface/transformers version v4.48.3 allows for a Regular Expression Denial of Service (ReDoS) attack. The regular expression used to process code blocks in docstrings contains nested quantifiers, leading to exponential backtracking when processing input with a large number of newline characters. An attacker can exploit this by providing a specially crafted payload, causing high CPU usage and potential application downtime, effectively resulting in a Denial of Service (DoS) scenario.
| Software | From | Fixed in |
|---|---|---|
transformers
|
- | 4.50.0 |
| huggingface / transformers | - | 4.48.3.x |
- https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57
- https://github.com/huggingface/transformers/pull/36648
- https://github.com/pypa/advisory-database/tree/main/vulns/transformers/PYSEC-2025-40.yaml
- https://huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4