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    CVE-2025-23167

    A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests. The issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination. Impact: * This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.

    Published:May 19, 2025
    Last Modified:Apr 15, 2026
    EPS:May 19, 2025
    EPSS Score:0.00096
    CVSS Score:6.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux

    Common Attack Pattern Enumeration and Classification (CAPEC)

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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