GHSA-fpwr-67px-3qhx
Transformers Regular Expression Denial of Service (ReDoS) vulnerability
At a glance
- Published
- Updated
- CVE
- CVE-2025-1194
- Aliases
- PYSEC-2026-1984
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Description
A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file `tokenization_gpt_neox_japanese.py` of the GPT-NeoX-Japanese model. The vulnerability occurs in the SubWordJapaneseTokenizer class, where regular expressions process specially crafted inputs. The issue stems from a regex exhibiting exponential complexity under certain conditions, leading to excessive backtracking. This can result in high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.48.1 (latest).
Affected packages
| Package | Versions |
|---|---|
| PyPI · transformers | introduced 0, fixed 4.50.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-1194 ADVISORY
- https://github.com/huggingface/transformers/commit/92c5ca9dd70de3ade2af2eb835c96215cc50e815 WEB
- https://github.com/huggingface/transformers PACKAGE
- https://huntr.com/bounties/86f58dcd-683f-4adc-a735-849f51e9abb2 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |