CVE-2025-2099
Huggingface Transformers ReDoS Vulnerability
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.
INFO
Published Date :
May 19, 2025, 12:15 p.m.
Last Modified :
May 21, 2025, 5:43 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-2099.
| URL | Resource |
|---|---|
| https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57 | Patch |
| https://huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4 | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-2099 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-2099 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 21, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:* versions up to (including) 4.48.3 Added Reference Type huntr.dev: https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57 Types: Patch Added Reference Type huntr.dev: https://huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4 Types: Exploit, Third Party Advisory -
New CVE Received by [email protected]
May. 19, 2025
Action Type Old Value New Value Added 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. Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-1333 Added Reference https://github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57 Added Reference https://huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-2099 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-2099
weaknesses.