What is CVE-2025-6051?

CVE-2025-6051 is a medium-severity vulnerability in Huggingface Huggingface/transformers, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2025-09-14.

How severe is CVE-2025-6051?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Huggingface Huggingface/transformers

CVE-2025-6051

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 version…

Vulnerability class: ReDoS (Regular Expression Denial of Service)

EPSS: 0.003 (27.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Huggingface Huggingface/transformers — versions unspecified
Huggingface Transformers — versions 4.52.4

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

security@huntr.dev (Exploit, Patch, Third Party Advisory, Issue Tracking)
security@huntr.dev (Patch)

Frequently asked questions

What is CVE-2025-6051?: CVE-2025-6051 is a medium-severity vulnerability in Huggingface Huggingface/transformers, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2025-09-14.
How severe is CVE-2025-6051?: Medium severity. CVSS v3 base score is 5.3 out of 10.