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CVE-2025-3262— Regular Expression Denial of Service (ReDoS) in huggingface/transformers

Quick assessment

Affected
huggingface huggingface/transformers
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hugging Face Transformers是Hugging Face开源的为 Jax、PyTorch 和 TensorFlow 打造的先进的自然语言处理。 Hugging Face Transformers 4.49.0版本存在安全漏洞，该漏洞源于transformers/commands/chat.py中SETTING_RE变量的正则表达式复杂性不足，可能导致正则表达式拒绝服务攻击。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-3262

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS) in huggingface/transformers
Source: CVE Program / CVE List V5
Vulnerability Description
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Hugging Face Transformers 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hugging Face Transformers是Hugging Face开源的为 Jax、PyTorch 和 TensorFlow 打造的先进的自然语言处理。 Hugging Face Transformers 4.49.0版本存在安全漏洞，该漏洞源于transformers/commands/chat.py中SETTING_RE变量的正则表达式复杂性不足，可能导致正则表达式拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
huggingface huggingface/transformers unspecified ~ 4.51.0 -

II. Public POCs for CVE-2025-3262

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III. Intelligence Information for CVE-2025-3262

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Patches & Fixes for CVE-2025-3262 (1)

Same Patch Batch · huggingface · 2025-07-07 · 4 CVEs total

CVE-2025-3263 Regular Expression Denial of Service (ReDoS) in huggingface/transformers
CVE-2025-3777 Improper Input Validation in huggingface/transformers
CVE-2025-3264 Regular Expression Denial of Service (ReDoS) in huggingface/transformers

IV. Related Vulnerabilities

Same product: huggingface/transformers
Same vendor: huggingface
Same weakness: CWE-1333

V. Comments for CVE-2025-3262

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