CVE-2025-2099

A vulnerability in the `preprocess_string()` function of the `transformers.testing_utils` module in huggingface/transformers version v4.48.3 allows for a Regular Expression Denial of Service (ReDoS) attack. The regular expression used to process code blocks in docstrings contains nested quantifiers, leading to exponential backtracking when processing input with a large number of newline characters. An attacker can exploit this by providing a specially crafted payload, causing high CPU usage and potential application downtime, effectively resulting in a Denial of Service (DoS) scenario.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57	Patch
https://huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:*

History

21 May 2025, 17:43

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-05-19 12:15

Updated : 2025-05-21 17:43

NVD link : CVE-2025-2099

Mitre link : CVE-2025-2099

CVE.ORG link : CVE-2025-2099

JSON object : View

Products Affected

huggingface

transformers

CWE

CWE-1333

Inefficient Regular Expression Complexity

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