high7.5
CVE-2025-3262
Transformers vulnerable to ReDoS attack through its SETTING_RE variable
Impact
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | transformers | >= 4.49.0, < 4.51.0 | 4.51.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Huggingface | Transformers | before 4.51.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
- https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
- https://github.com/advisories/GHSA-489j-g2vx-39wf
- https://nvd.nist.gov/vuln/detail/CVE-2025-3262
- https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca