PYSEC-2026-1985
Transformers vulnerable to ReDoS attack through its get_imports() function
At a glance
- Published
- Updated
- CVE
- CVE-2025-3264
- Aliases
- GHSA-jjph-296x-mrcr
- CVSS_V3
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · transformers | introduced 0, fixed 4.51.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-3264 ADVISORY
- https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76 WEB
- https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca WEB
- https://github.com/huggingface/transformers PACKAGE
- https://huntr.com/bounties/3c6f7822-9992-476d-8cf0-b0b1623427df WEB
- https://pypi.org/project/transformers PACKAGE
- https://github.com/advisories/GHSA-jjph-296x-mrcr ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |