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    CVE-2025-3262

    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.

    Published:Jul 7, 2025
    Last Modified:Aug 2, 2025
    EPS:Jul 7, 2025
    EPSS Score:0.00076
    CVSS Score:7.5

    Affected Products

    Vendor
    Huggingface
    Product
    Transformers

    Exploits

    https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

    Related CVEs

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High