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CVE-2025-6638

nvd nist
Published: Sep 12, 2025Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

Description

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically affecting the MarianTokenizer's `remove_language_code()` method. This vulnerability is present in version 4.52.4 and has been fixed in version 4.53.0. The issue arises from inefficient regex processing, which can be exploited by crafted input strings containing malformed language code patterns, leading to excessive CPU consumption and potential denial of service.

Affected (1)

Huggingface
1 product
Transformers
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Transformers
Version 4.52.4

Related CWEs

CWE-1333
Inefficient Regular Expression Complexity
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References (2)

Source: security@huntr.dev
Patch
Source: security@huntr.dev
ExploitThird Party Advisory

Timeline

No history available yet.