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.
History

Tue, 08 Jul 2025 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 07 Jul 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 07 Jul 2025 10:00:00 +0000

Type Values Removed Values Added
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.
Title Regular Expression Denial of Service (ReDoS) in huggingface/transformers
Weaknesses CWE-1333
References
Metrics cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published: 2025-07-07T09:55:11.030Z

Updated: 2025-07-07T14:40:12.531Z

Reserved: 2025-04-04T12:41:38.443Z

Link: CVE-2025-3264

cve-icon Vulnrichment

Updated: 2025-07-07T14:40:00.641Z

cve-icon NVD

Status : Received

Published: 2025-07-07T10:15:27.500

Modified: 2025-07-07T10:15:27.500

Link: CVE-2025-3264

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-07-07T09:55:11Z

Links: CVE-2025-3264 - Bugzilla