GitHub Advisoryadvisory · PyPI

GHSA-6rvg-6v2m-4j46 Transformers Regular Expression Denial of Service (ReDoS) vulnerability

MEDIUM Published 2025-03-20 Modified 2025-03-21 Official page ↗
Aliases
CVE-2024-12720
Ecosystem
PyPI
Packages
transformers
Severity
Moderate
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-1333
Reviewed
2025-03-21

Affected packages

• PyPI transformers: < 4.48.0 → fixed in 4.48.0

Description

A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file tokenization_nougat_fast.py. The vulnerability occurs in the post_process_single() function, where a regular expression processes specially crafted input. The issue stems from the regex exhibiting exponential time complexity under certain conditions, leading to excessive backtracking. This can result in significantly high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.46.3.

Related

Alias · CVE (1)

  • CVE-2024-12720 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