GHSA-jjph-296x-mrcr
Transformers vulnerable to ReDoS attack through its get_imports() function
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | transformers | < 4.51.0 | 4.51.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
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.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-3264
- https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
- https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
- https://github.com/huggingface/transformers
- https://huntr.com/bounties/3c6f7822-9992-476d-8cf0-b0b1623427df