GitHub Advisoryadvisory · PyPI

GHSA-fpwr-67px-3qhx Transformers Regular Expression Denial of Service (ReDoS) vulnerability

MEDIUM Published 2025-04-29 Modified 2025-08-04 Official page ↗
Aliases
CVE-2025-1194
Ecosystem
PyPI
Packages
transformers
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weaknesses
CWE-1333
Reviewed
2025-04-29

Affected packages

• PyPI transformers: < 4.50.0 → fixed in 4.50.0

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).

Related

Alias · CVE (1)

  • CVE-2025-1194 A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the… vulnerability

Weakness · CWE (1)

  • CWE-1333 Inefficient Regular Expression Complexity weakness

References