Vulnerability Description
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the `get_imports()` function within `dynamic_module_utils.py`. This vulnerability affects versions 4.49.0 and is fixed in version 4.51.0. The issue arises from a regular expression pattern `\s*try\s*:.*?except.*?:` used to filter out try/except blocks from Python code, which can be exploited to cause excessive CPU consumption through crafted input strings due to catastrophic backtracking. This vulnerability can lead to remote code loading disruption, resource exhaustion in model serving, supply chain attack vectors, and development pipeline disruption.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Huggingface | Transformers | >= 4.49.0, < 4.51.0 |
Related Weaknesses (CWE)
References
- https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6aPatch
- https://huntr.com/bounties/3c6f7822-9992-476d-8cf0-b0b1623427dfExploitThird Party Advisory
FAQ
What is CVE-2025-3264?
CVE-2025-3264 is a vulnerability with a CVSS score of 5.3 (MEDIUM). A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the `get_imports()` function within `dynamic_module_utils.py`. Thi...
How severe is CVE-2025-3264?
CVE-2025-3264 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-3264?
Check the references section above for vendor advisories and patch information. Affected products include: Huggingface Transformers.