How severe is CVE-2025-6051?

CVE-2025-6051 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-6051 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6051?

CVE-2025-6051 affects Huggingface Transformers. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6051?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-6051 have an EU (EUVD) identifier?

Yes. CVE-2025-6051 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29125.

When was CVE-2025-6051 published?

CVE-2025-6051 was published on 2025-09-14 and last updated on 2026-06-17.

CVE-2025-6051

CVE-2025-6051 is a medium-severity vulnerability in Huggingface Transformers with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29125
Weakness: CWE-1333
Affected product: Huggingface Transformers
Published: 2025-09-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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 severe is CVE-2025-6051?: CVE-2025-6051 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-6051 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6051?: CVE-2025-6051 affects Huggingface Transformers. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6051?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6051 have an EU (EUVD) identifier?: Yes. CVE-2025-6051 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29125.
When was CVE-2025-6051 published?: CVE-2025-6051 was published on 2025-09-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:huggingface:transformers:4.52.4:*:*:*:*:*:*:*

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