CVE-2025-6051

Description

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the `normalize_numbers()` method of the `EnglishNormalizer` class. This vulnerability affects versions up to 4.52.4 and is fixed in version 4.53.0. The issue arises from the method's handling of numeric strings, which can be exploited using crafted input strings containing long sequences of digits, leading to excessive CPU consumption. This vulnerability impacts text-to-speech and number normalization tasks, potentially causing service disruption, resource exhaustion, and API vulnerabilities.

How to fix CVE-2025-6051

To remediate CVE-2025-6051, upgrade the affected package to a fixed version below.

• —upgrade to 4.53.0 or later

Is CVE-2025-6051 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 4.53.0

CVSS scores

References (6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-6051
• PATCHgithub.com/huggingface/transformers
• WEBgithub.com/huggingface/transformers/commit/54a02160eb030da9be18231c77791f2eb3a52216
• WEBgithub.com/huggingface/transformers/commit/ba8eaba9865618253f997784aa565b96206426f0