CVE-2025-2099

HIGH EPSS 39.4%
Published May 19, 20251y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 19, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
39.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1333

Affected Products 1

VendorProductVersionRange
huggingfacetransformers* ≤4.48.3

References 2

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

Remediation

  • github.com https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57
    Patch